Phase compensation circuit module, power amplification assembly, compensation method and compensation equipment

文档序号：52335 发布日期：2021-09-28 浏览：28次中文

阅读说明：本技术 相位补偿电路模组、功率放大组件、补偿方法及设备 (Phase compensation circuit module, power amplification assembly, compensation method and compensation equipment ) 是由苏强彭振飞徐柏鸣于 2021-08-31 设计创作，主要内容包括：本公开提供了相位补偿电路模组、功率放大组件、补偿方法及设备；所述相位补偿电路模组至少包括：可变电阻、检测组件以及控制组件；检测组件的检测端与功率放大器的信号输入端连接,用于检测信号输入端的输入信号；控制组件与检测组件连接,用于根据检测组件检测的输入信号输出控制信号；可变电阻与控制组件的输出端连接,用于根据控制信号改变接入到功率放大器中阻值,可变电阻组成功率放大器的回路,用于构成功率放大器的晶体管的导通阻值；其中,晶体管的导通阻值,用于在功率放大器的输出信号相位变化时变化；实现了对幅度调制对相位调制的补偿,提升了线性度。(The disclosure provides a phase compensation circuit module, a power amplification component, a compensation method and a device; the phase compensation circuit module at least comprises: the variable resistor, the detection component and the control component; the detection end of the detection component is connected with the signal input end of the power amplifier and is used for detecting an input signal of the signal input end; the control assembly is connected with the detection assembly and used for outputting a control signal according to the input signal detected by the detection assembly; the variable resistor is connected with the output end of the control component and used for changing the resistance value accessed into the power amplifier according to the control signal, and the variable resistor forms a loop of the power amplifier and is used for forming the conduction resistance value of a transistor of the power amplifier; the on resistance value of the transistor is used for changing when the phase of an output signal of the power amplifier changes; the compensation of amplitude modulation to phase modulation is realized, and the linearity is improved.)

1. A phase compensation circuit module, comprising: the variable resistor, the detection component and the control component;

the detection component is provided with a detection end, the detection end is connected with the signal input end of the power amplifier and is used for detecting the voltage swing of the input signal of the signal input end;

the control component is connected with the detection component and used for outputting a control signal according to the input signal detected by the detection component;

the variable resistor is connected with the output end of the control component and used for changing the resistance value accessed into the power amplifier according to the control signal, and the variable resistor forms a loop of the power amplifier and is used for forming the conduction resistance value of a transistor of the power amplifier; the on-resistance value of the transistor is used for decreasing when the phase of the output signal of the power amplifier is decreased and increasing when the phase of the output signal of the power amplifier is increased; and the increased or decreased conduction resistance value is used for changing the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM from an arc line segment to a straight segment.

2. The phase compensation circuit module of claim 1, wherein the control module comprises: a first sub-control assembly and a second sub-control assembly;

the first sub-control assembly is connected with the detection assembly and used for outputting a control voltage which is in direct proportion or inverse proportion to the input signal according to the input signal;

the second sub-control assembly is connected between the rear end of the first sub-control assembly and the variable resistor and used for limiting the output voltage value range of the control voltage.

3. The phase compensation circuit module as claimed in claim 2, wherein the first sub-control element comprises at least: the power supply comprises a first current mirror, a first switch tube, a second current mirror, a power supply, a control circuit and a first control voltage switch tube;

the first current mirror is connected with the first end of the first switch tube and is used for inputting signals to the first switch tube in a mirror image mode;

the second end of the first switch tube is connected with the first end of the second current mirror, and the first switch tube is used for controlling the conduction of the second current mirror;

a second end of the second current mirror is connected with a first end of the control circuit and is used for mirroring the current proportional to the input signal to the control circuit;

the power supply is connected with the second end of the control circuit and used for providing an upper limit voltage for the control circuit; wherein the control circuit is configured to provide a resistance value that varies in accordance with a preset compensation;

the first control voltage switch tube is connected with the first end of the control circuit and the second current mirror and is used for controlling and outputting control voltage; wherein the control voltage has a value of: the value of the upper limit voltage minus the product of the value of the current proportional to the input signal and the resistance of the control circuit.

4. The phase compensation circuit module as claimed in claim 2, wherein the first sub-control element comprises at least: the power supply comprises a first current mirror, a second switch tube, a power supply, a control circuit and a second control voltage switch tube;

the first current mirror is connected with a first end of the second switching tube, a second end of the second switching tube is connected with a second end of the control circuit, and the first current mirror is used for inputting a signal to the control circuit through a mirror image of the second switching tube;

the power supply is connected with the first end of the control circuit, the second end of the control circuit is connected with the second control voltage switch tube, wherein the voltage value of the second control voltage switch tube is as follows: a sum of a voltage value provided by the power supply and a voltage value of the control circuit.

5. The phase compensation circuit module as claimed in claim 2, 3 or 4, wherein the second sub-control element is configured to output a first voltage value or a second voltage value of the control voltage according to the value of the control voltage;

if the control voltage is in direct proportion to the input signal and is greater than a maximum preset threshold value, the second sub-control assembly outputs a first voltage value of the control voltage;

if the control voltage is inversely proportional to the input signal and the control voltage is smaller than a minimum preset threshold, the second sub-control component outputs a second voltage value of the control voltage;

wherein the second voltage value is less than the first voltage value.

6. The phase compensation circuit module as claimed in claim 3 or 4, wherein the control circuit comprises a plurality of sub-control circuits connected in series end to end;

one of the sub-control circuits includes: the transistor and the control resistor, wherein the source electrode and the drain electrode of the transistor are connected with two ends of the control resistor in parallel; the source electrode of the transistor is connected with one end, facing the first control voltage switching tube, of the control resistor, and the drain electrode of the transistor is connected with one end, far away from the first control voltage switching tube, of the control resistor; the total resistance value of the control circuit is equal to the sum of the resistance values of the plurality of sub-control circuits.

7. A power amplifying assembly, the power amplifying assembly comprising: a power amplifier and the phase compensation circuit module of any one of claims 1 to 6; wherein the power amplifier comprises at least: the circuit comprises a signal input end, a signal output end, a transistor arranged between the signal input end and the signal input end, and a capacitor connected with the transistor;

the first end of the variable resistor is connected with the capacitor, and the second end of the variable resistor is connected with the transistor and is used for forming a loop of the power amplifier to form the conduction resistance value of the transistor of the power amplifier; the on-resistance value of the transistor is used for decreasing when the phase of the output signal of the power amplifier is decreased and increasing when the phase of the output signal of the power amplifier is increased; and the increased or decreased conduction resistance value is used for changing the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM from an arc line segment to a straight segment.

8. A compensation method for compensating the phase of the output signal of the power amplifier of the power amplification module of claim 7 by using the phase compensation circuit module of any one of claims 1 to 6, the method comprising:

detecting an input signal of the signal input end through the detection component;

outputting a control signal by the control component according to the input signal detected by the detection component; the control signal is used for changing a resistance value accessed into the power amplifier, and the variable resistor forms a loop of the power amplifier and is used for forming a conduction resistance value of a transistor of the power amplifier; the on-resistance value of the transistor is used for decreasing when the phase of the output signal of the power amplifier is decreased and increasing when the phase of the output signal of the power amplifier is increased; and the increased or decreased conduction resistance value is used for changing the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM from an arc line segment to a straight segment.

9. The compensation method of claim 8, further comprising:

outputting a control voltage which is in direct proportion or inverse proportion to the input signal through a first sub-control component according to the input signal;

limiting, by the second sub-control component, an output voltage value range of the control voltage.

10. The compensation method of claim 9, further comprising:

mirroring an input signal through a first current mirror image first switching tube;

the conduction of a second current mirror is controlled through the first switching tube;

mirroring a current proportional to the input signal to a control circuit through the second current mirror;

providing an upper limit voltage to the control circuit via a power supply; wherein the control circuit is configured to provide a resistance value that varies in accordance with a preset compensation;

controlling output voltage through a first control voltage switching tube; wherein the control voltage has a value of: the value of the upper limit voltage minus the product of the value of the current proportional to the input signal and the resistance of the control circuit.

11. The compensation method of claim 9, further comprising:

controlling the first current mirror to mirror an input signal to the control circuit through the second switching tube; wherein, the voltage value of the second control voltage switch tube is: the sum of the voltage value provided by the power supply and the voltage value of the control circuit.

12. A compensation method according to claim 9 or 10 or 11, characterized in that the method further comprises:

outputting a first voltage value or a second voltage value of the control voltage according to the value of the control voltage through the second sub-control component;

wherein the second voltage value is less than the first voltage value.

13. A compensation apparatus, characterized in that the compensation apparatus comprises:

a memory;

a processor coupled to the memory for executing instructions by a computer of the memory to implement the method of any of claims 8 to 12.

Technical Field

The disclosure relates to the field of electronic technology, and in particular to a phase compensation circuit module, a power amplification component, a compensation method and a compensation device.

Background

In the existing power amplifier, amplitude modulation versus phase modulation (AM-PM) can represent the linearity index of the power amplifier; the AM-PM distortion refers to the change of phase difference between input and output signals caused by the change of signal amplitude after the input signals enter the power amplifier; due to the existence of the nonlinearity of the amplifier, the nonlinearity of the transistor is increased along with the increase of the input signal, and the AM-PM is further deteriorated, so that the overall linearity is affected.

The existing compensating circuit or device related to the AM-PM is a phase mutual compensating circuit adopting two stages of amplifying transistors, but has poor overall adjustable performance and is difficult to deal with the complicated AM-PM changing situation. Therefore, a phase compensation circuit or device having good adjustability and capable of coping with complicated AM-PM changes is required.

Disclosure of Invention

The disclosure provides a phase compensation circuit module, a power amplification component, a compensation method and a compensation device.

According to a first aspect of the present disclosure, a phase compensation circuit module is provided, which at least includes: the variable resistor, the detection component and the control component;

the detection assembly is provided with a detection end, and the detection end is connected with the signal input end of the power amplifier and is used for detecting an input signal of the signal input end;

the control component is connected with the detection component and used for outputting a control signal according to the input signal detected by the detection component;

Optionally, the control assembly comprises: a first sub-control assembly and a second sub-control assembly;

Optionally, the first sub-control component includes at least: the power supply comprises a first current mirror, a first switch tube, a second current mirror, a power supply, a control circuit and a first control voltage switch tube;

the first current mirror is connected with the first end of the first switch tube and is used for inputting signals to the first switch tube in a mirror image mode;

the second end of the first switch tube is connected with the first end of the second current mirror, and the first switch tube is used for controlling the conduction of the second current mirror;

a second end of the second current mirror is connected with a first end of the control circuit and is used for mirroring the current proportional to the input signal to the control circuit;

Optionally, the first sub-control component includes at least: the power supply comprises a first current mirror, a second switch tube, a power supply, a control circuit and a second control voltage switch tube;

Optionally, the second sub-control component is configured to output a first voltage value or a second voltage value of the control voltage according to the value of the control voltage;

wherein the second voltage value is less than the first voltage value.

Optionally, the control circuit includes a plurality of sub-control circuits connected in series end to end;

According to a second aspect of the present disclosure, there is provided a power amplifying assembly comprising: a power amplifier and the phase compensation circuit module of the first aspect; the power amplifier includes at least: the circuit comprises a signal input end, a signal output end, a transistor arranged between the signal input end and the signal input end, and a capacitor connected with the transistor;

According to a third aspect of the present disclosure, there is provided a compensation method for compensating the phase of the output signal of the power amplifier provided by the second aspect by using the phase compensation circuit module provided by the first aspect, the method comprising:

detecting an input signal of the signal input end through the detection component;

Optionally, the method further comprises:

outputting a control voltage which is in direct proportion or inverse proportion to the input signal according to the input signal through the first sub-control component;

limiting, by the second sub-control component, an output voltage value range of the control voltage.

Optionally, the method further comprises:

mirroring an input signal through a first current mirror of the first switching tube;

the conduction of the second current mirror is controlled by the first switching tube;

mirroring a current proportional to the input signal to the control circuit through the second current mirror;

providing an upper limit voltage to the control circuit via the power supply; wherein the control circuit is configured to provide a resistance value that varies in accordance with a preset compensation;

controlling output voltage through the first control voltage switching tube; wherein the control voltage has a value of: the value of the upper limit voltage minus the product of the value of the current proportional to the input signal and the resistance of the control circuit.

Optionally, the method further comprises:

controlling the first current mirror to mirror an input signal to the control circuit through the second switching tube; wherein, the voltage value of the second control voltage switch tube is: a sum of a voltage value provided by the power supply and a voltage value of the control circuit.

Optionally, the method further comprises:

outputting a first voltage value or a second voltage value of the control voltage according to the value of the control voltage through the second sub-control component;

wherein the second voltage value is less than the first voltage value.

According to a fourth aspect of the present disclosure, there is provided a compensation apparatus comprising:

a memory;

a processor, coupled to the memory, for implementing the steps of the supplementing method of the third aspect by executing the instructions with the computer of the memory.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the phase compensation circuit module provided by the embodiment of the disclosure at least comprises a variable resistor, a detection component and a control component; the detection end of the detection component is connected with the signal input end of the power amplifier, and an input signal of the signal input end is detected; the control assembly is connected with the detection assembly and outputs a control signal according to the detected input signal; the variable resistor is connected with the output end of the control component and changes the resistance value accessed into the power amplifier according to the control signal; the variable resistor forms a loop of the power amplifier and is used for forming the on-resistance value of a transistor of the power amplifier; the on-resistance value of the transistor is used for decreasing when the phase of the output signal of the power amplifier is decreased and increasing when the phase of the output signal of the power amplifier is increased; the increased or decreased conduction resistance value is used for changing the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM from an arc line segment to a straight segment; compared with the existing phase compensation circuit of a simple two-stage transistor, the phase compensation circuit has the advantages that the detection component and the control component are added, the control signal output by the control component can be increased or decreased according to specific input signals and the change condition of the phase of an output signal, and further the variable resistor can be increased or decreased according to the control signal, so that the arc line of the increasing or decreasing trend of the change curve of the phase of the output signal has the function of keeping a straight section, and further the stability of the AM-PM and the linearity of the power amplifier are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Fig. 1 is a schematic diagram of a conventional power amplifier;

FIG. 2 is a diagram illustrating a distortion curve of a conventional AM-PM;

FIG. 3 is a diagram illustrating a distortion curve of a conventional AM-PM;

fig. 4 is a schematic diagram of a phase compensation circuit module and a power amplifier according to an exemplary embodiment;

fig. 5 is a schematic diagram of a phase compensation circuit module and a power amplifier according to an exemplary embodiment;

FIG. 6 is a diagram illustrating a structure of a variable resistor of the phase compensation circuit module according to an exemplary embodiment;

fig. 7 is a graph illustrating a gate phase of the transistor M2 of the power amplifier according to the control voltage Vcon in accordance with an exemplary embodiment;

FIG. 8 is a schematic diagram illustrating a compensated variation curve for distortion of AM-PM in accordance with an exemplary embodiment;

FIG. 9 is a schematic diagram illustrating a compensated variation curve for distortion of AM-PM in accordance with an exemplary embodiment;

FIG. 10 is an enlarged view of a portion of a phase compensation circuit module according to an exemplary embodiment;

FIG. 11 is an enlarged view of a portion of a phase compensation circuit module according to an exemplary embodiment;

fig. 12 is an overall structural view of a phase compensation circuit module according to an exemplary embodiment;

fig. 13 is a diagram illustrating a relationship between a control voltage Vcon output by a control element of a phase compensation circuit module and an input signal Iout according to an exemplary embodiment;

fig. 14 is a diagram illustrating a relationship between a control voltage Vcon output by a control element of a phase compensation circuit module and an input signal Iout according to an exemplary embodiment;

FIG. 15 is a diagram illustrating an exemplary embodiment of a step circuit equivalent resistance in a control component of a phase compensation circuit module;

FIG. 16 is a diagram illustrating a relationship between an output voltage Vout and an input signal Iout under the action of an equivalent resistor Req of a control circuit according to an exemplary embodiment;

fig. 17 is a diagram illustrating the relationship between the AM-PM and the input signal Iout under the effect of the equivalent resistance Req of the control circuit according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with embodiments of the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosed embodiments, as detailed in the attached application.

Fig. 1 shows a conventional power amplifier, where RFin and RFout are input and output nodes, respectively, the amplifier circuit includes a compensation network, a two-layer stacked amplifier tube composed of M1 and M2, Ibias and Vg12 constitute a bias network, VDD provides a dc feed network, the dc feed network is connected to the drain of a transistor through a Choke coil Choke1, Cb1 and Cb2 are dc blocking capacitors for input and output, and L1 and C1 constitute an output matching network. With the increase of the input signal, the nonlinearity of the power amplifier is enhanced, the distortion phenomenon of the amplifier is increased, and the AM-PM distortion of the amplifier has two changing trends, as shown in fig. 2, the AM-PM curve may show an increasing trend with the increase of the input power; it is also possible to exhibit a decreasing trend with increasing input power, as shown in fig. 3. If this tendency of AM-PM is not compensated for, the linearity index of the circuit is further deteriorated and cannot meet the index requirement. The existing phase compensation method through front and rear two-stage power amplification has poor overall adjustable performance and is difficult to deal with the complicated AM-PM change situation. In an embodiment of the present disclosure, referring to fig. 4 and fig. 5, a phase compensation circuit module is provided, where the phase compensation circuit module at least includes: a variable resistor 101, a detection component 102 and a control component 103;

the detection component 102 has a detection end, and the detection end is connected with the signal input end of the power amplifier and is used for detecting an input signal of the signal input end;

the control component 103 is connected with the detection component 102, and is configured to output a control signal according to the input signal detected by the detection component 102;

the variable resistor 101 is connected with the output end of the control component 103, and is used for changing the resistance value accessed into the power amplifier 200 according to the control signal, and the variable resistor 101 forms a loop of the power amplifier and is used for forming the conduction resistance value of the transistor of the power amplifier; the on-resistance value of the transistor is used for decreasing when the phase of the output signal of the power amplifier is decreased and increasing when the phase of the output signal of the power amplifier is increased; and the increased or decreased conduction resistance value is used for changing the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM from an arc line segment to a straight segment.

In the embodiment of the present disclosure, the transistors include a first transistor M1 and a second transistor M2, and the first transistor M1 and the second transistor M2 constitute a stacked primary amplifying transistor.

In the embodiment of the present disclosure, a first bias circuit is connected to the first transistor M1 for providing a bias current to the first transistor M1; a second bias circuit is coupled to the second transistor for providing a bias voltage to the second transistor M2.

In the embodiment of the present disclosure, as shown in fig. 5, the first bias circuit includes: an Ibias bias current connected to the gate of the first transistor M1; the second bias circuit includes: a power supply Vg12 and a resistor R1; the power source Vg12 is connected with the resistor R1, and the resistor R1 is connected with the gate of the second transistor M2; the gate capacitance Cgate is connected to the gate of the second transistor M2 and the resistor R1.

In one embodiment, the variable resistor Rgate is a voltage-controlled variable resistor, which is configured as a circuit configuration as shown in fig. 6.

In the embodiment of the present disclosure, as shown in fig. 5, L1 and C1 constitute a matching circuit; a first dc blocking capacitor Cb1 is further included between the matching circuit and the signal input terminal RFin, and a second dc blocking capacitor is further included between the signal output terminal and the drain of the second transistor M2; the impedance of the matching circuit formed by the L1 and the C1 is matched with the impedance of the first transistor and the internal impedance of the signal source at the signal input end of the power amplifier, so that the power amplifier can obtain the maximum power from the signal input end.

In the embodiment of the present disclosure, the detecting component (Detector) is a Detector for detecting a variation amplitude of an input signal from the signal input terminal RFin; when the amplitude of the input signal exceeds a preset threshold value, the compensation circuit module starts to start. The control component outputs a control signal according to the input signal.

In one embodiment, the control signal is a control voltage Vcon for controlling the resistance value of the variable resistor Rgate by a voltage.

In the embodiment of the disclosure, the gate capacitor Cgate, the variable resistor Rgate, the first transistor M1 and the second transistor M2 form a loop, and when the resistance of the variable resistor Rgate changes, the on resistance in the loop changes, so that the equivalent capacitance in the loop also changes, and further the phase of the second transistor changes, and further the amplitude modulation changes the phase distortion AM-PM value.

In the embodiment of the disclosure, the variable resistor is inversely proportional to the control voltage Vcon; the AM-PM is inversely proportional to the variable resistor, and further, as shown in fig. 7, the gate Phase of the second transistor M2, i.e., the relationship between the output signal Phase and Vcon, is in a proportional relationship within a certain range, i.e., the AM-PM is proportional to the control voltage Vcon.

In the embodiment of the disclosure, the AM-PM has a condition of decreasing or increasing, so that the compensation circuit module is required to enable the variable resistor to decrease when the AM-PM decreases so as to enable the AM-PM to increase; when the AM-PM distortion is increased, the AM-PM distortion is reduced, and the AM-PM distortion is further compensated.

In the embodiment of the present disclosure, with reference to fig. 8, after the increasing original state curve of the AM-PM is compensated by the compensation circuit module, that is, Vcon is decreased after the AM-PM is increased, the on-resistance is increased after the AM-PM is increased, and further the AM-PM is decreased, and the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM is changed from an arc segment to a straight segment.

In the embodiment of the present disclosure, with reference to fig. 9, after the AM-PM reduced original state curve is compensated by the compensation circuit module, that is, Vcon is increased after the AM-PM is reduced, the on-resistance is reduced after the AM-PM is reduced, and further the AM-PM is increased, and the change curve of the AM-PM is changed from an arc line segment to a straight segment.

In the embodiment of the disclosure, compared with the existing fig. 1, 2 and 3, the compensation circuit module is added, so that the originally grounded gate capacitor is connected with the variable resistor of the compensation circuit module, and then the compensation circuit module is used for adjusting the resistance value of the variable resistor to realize the compensation of the AM-PM, thereby improving the stability of the AM-PM and the linearity of the power amplifier.

In an embodiment of the present disclosure, the control assembly includes: a first sub-control assembly and a second sub-control assembly;

In the embodiment of the present disclosure, referring to fig. 5, the first sub-Control element is a Voltage Control circuit (Voltage Control), and the second sub-Control element is a clamp circuit (Vclamp).

In the embodiment of the present disclosure, the second sub-control module is connected to the rear end of the first sub-control module, where the rear end of the first sub-control module is an output end, and the front end of the first sub-control module is an input end.

In the embodiment of the disclosure, the first sub-Control component and the Voltage Control circuit (Voltage Control) are configured to output a Control Voltage Vcon in a direct proportion or an inverse proportion to the input signal according to the input signal, so as to Control a resistance value of the variable resistor Rgate to change.

In the embodiment of the disclosure, the second sub-control element, the clamp circuit (Vclamp), may control the output voltage value range of the control voltage Vcon, so as to control the variation range of the variable resistor.

In the embodiment of the present disclosure, as shown in fig. 10, 11, and 12, the first sub-control assembly at least includes: the power supply comprises a first current mirror, a first switch tube, a second current mirror, a power supply, a control circuit and a first control voltage switch tube;

the first current mirror is connected with the first end of the first switch tube and is used for inputting signals to the first switch tube in a mirror image mode;

the second end of the first switch tube is connected with the first end of the second current mirror, and the first switch tube is used for controlling the conduction of the second current mirror;

a second end of the second current mirror is connected with a first end of the control circuit and is used for mirroring the current proportional to the input signal to the control circuit;

In the embodiment of the present disclosure, with reference to fig. 10 and 12, a first current mirror is formed by CMOS transistors Q1, Q2, Q3, and Q4; wherein the gate and source of transistor Q1 are connected to and mirror symmetric with the gate and source of transistor Q3; the gate and source of the transistor Q2 are connected to and mirror-symmetrical to the gate and source of the transistor Q4, the drain of the transistor Q2 is connected to the gate and source of the transistor Q1, and the drain of the transistor Q4 is connected to the gate and source of the transistor Q3.

In the embodiment of the disclosure, a source of the transistor Q2 is connected to an output terminal of the detection component, a power supply VDD is connected to drains of the transistors Q1 and Q3, the power supply VDD is used for providing a voltage source for the first current mirror, the input signal Iout is mirrored to the transistors Q3 and Q4 through the transistor Q1 and the transistor Q2, and a source and a gate of the transistor Q4 are connected to a drain of the first switch tube Q5 or the second switch tube Q6, and are used for mirroring the input signal Iout to the first switch tube Q5 or the second switch tube Q6.

In the embodiment of the disclosure, a second current mirror is composed of CMOS transistors Q7 and Q8, a drain and a gate of a transistor Q7 are connected with a drain and a gate of a transistor Q8, a source of a transistor Q7 is connected with a source of a transistor Q8, a drain and a gate of a transistor Q7 are connected with a source of a first switch tube Q5, and the second current mirror is used for mirroring an input signal Iout to a VRB 1.

In the embodiment of the present disclosure, the second current mirror is connected to the VRB2 at the first end of the control circuit, and both the first current mirror and the second current mirror can be used to mirror the current k1 × Iout proportional to the input signal to the control circuit, where k1 is a proportionality coefficient and takes a positive value.

In the embodiment of the present disclosure, the power source is Vref, and the power source is connected to a transistor, and when CTRL _ Fall _ N =1, the transistor is turned on, and is connected to the second terminal VRA3 of the control circuit through the voltage output terminal VRA1, so as to provide the upper limit voltage Vref to the control circuit.

In an embodiment of the present disclosure, the first control voltage switch tube includes: when CTRL _ Fall _ N =1 and CTRL _ Fall _ P =0, the transistors Q15 and Q16 turn on the first control voltage switching tube, and output the voltage at the first terminal of the control circuit as a control voltage. In the embodiment of the present disclosure, when CTRL _ Fall _ N =1 and CTRL _ Fall _ P =0, the calculation formula of the control voltage Vcon is as follows:

vcon = Vref-k1 Iout Req (Vcon > Vclamp) formula 1.1

Vcon = Vclamp (Vcon < Vclamp) formula 1.2

In the above equations 1.1 and 1.2, Vref is a preset dc power supply voltage as a starting voltage of Vcon, k1 represents a change ratio of Iout through a mirror current source of the second current mirror, Req represents an equivalent resistance value of the control circuit, and Vclamp represents a preset voltage value of the clamp circuit.

In the embodiment of the disclosure, CTRL _ Fall _ N =1, CTRL _ Fall _ P =0, the first switching tube Q5 is turned on, the second current mirror Q7, Q8 is turned on, the transistors Q15 and Q16 at the first control voltage switching tube are turned on, the transistors Q13 and Q14 at the second control voltage switching tube are turned off, the power source Verf supplies voltage to the control circuit, the voltage value at the VRB2 is the voltage value at the VRB1, and the first end of the control circuit is close to the voltage value Vcon at the first control voltage switching tube. Transistor Q18 is on, transistors Q17, Q19 are off, and power supply Ib1 is grounded.

In the embodiment of the present disclosure, formula 1.1 indicates that the control voltage value Vcon is in inverse proportion to the input signal Iout, and when the input signal increases and the distortion variation curve of the AM-PM is the variation curve as shown in fig. 2 or 8, the control voltage value Vcon =1, CTRL _ Fall _ P =0, and the control voltage value Vcon is in inverse proportion to the input signal Iout.

In the embodiment of the disclosure, by CTRL _ Fall _ N =1 and CTRL _ Fall _ P =0, the resistance of the variable resistor can be controlled to increase with the increase of AM-PM by controlling the voltage Vcon, and the increased variable resistance can perform the compensation function as shown in fig. 8.

In the embodiment of the present disclosure, as shown in fig. 10, 11, and 12, the first sub-control assembly at least includes: the power supply comprises a first current mirror, a second switch tube, a power supply, a control circuit and a second control voltage switch tube;

In the embodiment of the present disclosure, with reference to fig. 10 and 12, a first current mirror is formed by CMOS transistors Q1, Q2, Q3, and Q4, and the first current mirror is connected to the first end of the second switch tube and is used for mirroring the input signal Iout to the second switch tube Q6.

In the embodiment of the disclosure, the second terminal VRA2 of the second switch tube is connected to the second terminal VRA3 of the control circuit, and the first current mirror inputs the input signal Iout to the second terminal VRA3 of the control circuit through the second switch tube Q6.

In the embodiment of the present disclosure, the power source Ib1 is connected to the first terminal VRB2 of the control circuit, and the second terminal VRA2 of the control circuit is connected to the second control voltage switch Q13, Q14.

In the embodiment of the present disclosure, when CTRL _ Fall _ N =0 and CTRL _ Fall _ P =1, Q5 is turned off, Q6 is turned on, the transistor at the power supply Vref is turned off and is not available, the second control voltage switching tubes Q13 and Q14 are turned on, the first control voltage switching tubes Q15 and Q16 are turned off, the transistors Q17 and Q19 at the power supply Ib1 are turned on, the transistor Q18 is turned off, the voltage at the VRB2 is a voltage value at the drain of the transistor Q17, and the voltage value at the VRA3 at the second end of the control circuit is:

vcon = k1 Iout Req + VRB2 (Vcon < Vpk) formula 1.3

Vcon = Vpk (Vcon > Vpk) formula 1.4

In the above equation 1.3, k1 represents the change ratio of Iout through the current source, Req represents the equivalent resistance of the control circuit, VRB2 represents the voltage value at the drain node of Q17, and Vpk represents the preset voltage value of the clamp circuit for the Vcon voltage.

In the embodiment of the present disclosure, k1 is the proportion of the first current mirror and is a positive number.

In the embodiment of the present disclosure, formula 1.3 indicates that the control voltage value Vcon is in a direct proportion relationship with the input signal, and when the input signal increases and the distortion variation curve of the AM-PM is the variation curve as shown in fig. 3 or 9, the control voltages CTRL _ Fall _ N =0 and CTRL _ Fall _ P =1 are controlled, and the control voltage value Vcon is in an inverse proportion relationship with the input signal Iout.

In the embodiment of the disclosure, when CTRL _ Fall _ N =0 and CTRL _ Fall _ P =1, the resistance of the variable resistor may be controlled to decrease with the decrease of AM-PM by using the control voltage Vcon, and the decreased variable resistance may perform a compensation function as shown in fig. 9.

In an embodiment of the present disclosure, the second sub-control component is configured to output a first voltage value or a second voltage value of the control voltage according to the value of the control voltage;

wherein the second voltage value is less than the first voltage value.

In the embodiment of the disclosure, the clamping circuit of the second sub-control module outputs a first voltage value or a second voltage value of the control voltage, the second voltage value is smaller than the first voltage value, the first voltage value is a highest voltage value and is obtained according to a highest voltage value of the transistor linear interval, and the second voltage value is a lowest voltage value and is obtained according to a lowest voltage value of the transistor linear interval.

In the embodiment of the present disclosure, with reference to fig. 13, formula 1.2 indicates that the second voltage value Vclamp provided by the clamp circuit is the lowest voltage value, and the control voltage is prevented from being lower than the preset value, where the control voltage lower than the preset value indicates that the transistor of the first sub-control component may enter a nonlinear region, and at this time, the inverse relationship between the control voltage value Vcon and the input signal Iout no longer changes in a linear proportion. Therefore, the clamp circuit can not effectively compensate the distortion of the AM-PM because the transistor enters a nonlinear region to effectively output a linearly changing voltage.

In the embodiment of the disclosure, with reference to fig. 14, formula 1.4 indicates that the first voltage value Vpk provided by the clamp circuit is the highest voltage value, so as to prevent the control voltage from being higher than the preset value, and the transistor of the first sub-control element may enter a non-linear region, at this time, the proportional relationship between the control voltage value Vcon and the input signal Iout does not change in linear proportion any more. Therefore, the clamp circuit can not effectively compensate the distortion of the AM-PM because the transistor enters a nonlinear region to effectively output a linearly changing voltage.

In the embodiment of the disclosure, the control circuit comprises a plurality of sub-control circuits which are sequentially connected in series end to end;

In the embodiment of the present disclosure, as shown in fig. 11 and 12, the transistor Q9 and the control resistor R1 are connected in parallel to form a first sub-control circuit, the transistor Q10 and the control resistor R2 are connected in parallel to form a second sub-control circuit, the transistor Q11 and the control resistor R3 are connected in parallel to form a third sub-control circuit, and the transistor Q12 and the control resistor R4 are connected in parallel to form a fourth sub-control circuit.

In the embodiment of the present disclosure, the number of the sub-control circuits is not limited to 4, and may be set according to requirements.

In the embodiment of the disclosure, the resistance of one sub-control circuit is related to whether the transistor is turned on, and if the transistor is turned on, the control resistor connected in parallel with the transistor is short-circuited, and the resistance of the sub-control resistor is 0. If the transistor is disconnected, the control resistor connected in parallel with the transistor is not short-circuited, and the resistance value of the sub-control circuit is the resistance value of the control resistor.

In the embodiment of the present disclosure, the structure of the above circuit of the control circuit may implement step change of the resistance value of the control circuit, that is, the resistance value of the control circuit decreases every time one transistor is turned on, and decreases sequentially if the transistor is turned on sequentially. The resistance of the control circuit increases every time one transistor is turned off, and increases in sequence if turned off in sequence.

In the embodiment of the disclosure, the function proportional relation between the input signals RFin and Vcon can be flexibly adjusted through the control circuit, so as to realize the controllable step change of Vcon. The four-bit control signals CTRL _ S <0>, CTRL _ S <1>, CTRL _ S <2> and CTRL _ S <3> control the on/off of the resistors R1-R4, and the equivalent resistance Req and the control logic of CTRL _ S are multiplied by the current flowing through the equivalent resistance Req itself to obtain the voltage Vout = k1 Iout Req as shown in the comparison chart of the equivalent resistance of the step circuit in the control component of the phase compensation circuit module in fig. 15, so that the proportional relationship between the input signal Iout and the control voltage Vcon can be changed.

In the embodiment of the disclosure, when the four control signals CTRL _ S <0>, CTRL _ S <1>, CTRL _ S <2> and CTRL _ S <3> are all equal to 1, and all the control resistances are equal to 0, when the first switching tube Q5 or the second switching tube Q6 is turned on, the first current mirror and/or the second current mirror may prevent the whole circuit from being short-circuited due to the connection between VRB1 and VRB2, or the connection between VRA2 and VRA 3.

In the embodiment of the disclosure, as shown in fig. 16, when the CTRL _ S signal is changed as shown in the table, and the obtained Req1> Req2> Req3 shows the slope change of Iout and Vout.

In the embodiment of the present disclosure, as shown in fig. 17, the effect of the change of the corresponding equivalent resistance Req on the AM-PM of the circuit is shown.

In the embodiment of the disclosure, the above design of the control circuit can flexibly control the change of the input signal Iout and the voltage Vout, and further change the proportional relation between the input signal Iout and the control voltage Vcon.

In the embodiment of the disclosure, through an external logic controller and/or an intelligent terminal: logic controller such as controller CPU, singlechip, intelligent terminal if: the compensation parameters of the adjusting circuit of the smart phone or the computer can realize the programming adjustability of the AM-PM. The phase compensation circuit module and the power amplifier can be integrated in a chip, so that the cost is low, the occupied resource is less, and the linearity index of the power amplifier can be improved. For example, by controlling the logic gate switch: the values of CTRL _ S <0>, CTRL _ S <1>, CTRL _ S <2>, CTRL _ S <3>, CTRL _ Fall _ P, CTRAL _ Fall _ N are 0 or 1 to control the on or off of the corresponding transistors, so that the compensation of the phase compensation circuit module on the AM-PM of the power amplifier is realized.

In the embodiment of the present disclosure, with reference to fig. 4 and 5, a power amplification module is provided, where the power amplification module includes: the power amplifier 200 and the phase compensation circuit module 100 provided by the above embodiments; wherein the power amplifier comprises at least: a signal input terminal RFin, a signal output terminal RFout, transistors M1, M2 disposed between the signal input terminal RFin and the signal input terminal RFout, and a capacitor Cgate connected to the transistors;

the first end of the variable resistor is connected with the capacitor, and the second end of the variable resistor is connected with the transistor and is used for forming a loop of the power amplifier to form the conduction resistance value of the transistor of the power amplifier; the on-resistance value of the transistor is used for increasing when the phase of the output signal of the power amplifier is reduced, and decreasing when the phase of the output signal of the power amplifier is increased; and the increased or decreased conduction resistance value is used for changing the change curve of the amplitude modulation of the output signal to the phase modulation AM-PM from an arc line segment to a straight segment.

In the embodiment of the present disclosure, the capacitor Cgate connected to the transistor is a gate capacitor, and is connected to the gate of the transistor M2, and the transistors M1 and M2 constitute a stacked two-stage amplifying transistor.

In an embodiment of the present disclosure, the first bias circuit includes: a power supply Vg12 and a resistor R1; the second bias circuit includes: ibias bias current.

In the embodiment of the present disclosure, as shown in fig. 5, the first bias circuit includes: a power supply Vg12 and a resistor R1; the second bias circuit includes: ibias bias current.

In one embodiment, the variable resistor Rgate is a voltage-controlled variable resistor, which is configured as a circuit configuration as shown in fig. 6.

In the embodiment of the present disclosure, as shown in fig. 5, L1 and C1 constitute a matching circuit; and a direct current blocking capacitor is also arranged between the matching circuit and the signal input end RFin.

In the embodiment of the present disclosure, the Detector is a Detector, and is configured to detect a variation amplitude of an input signal from the signal input end RFin; when the amplitude of the input signal exceeds a preset threshold value, the compensation circuit module starts to start. The control component outputs a control signal according to the input signal.

In one embodiment, the control signal is a control voltage Vcon for controlling the resistance value of the variable resistor Rgate by a voltage.

In the embodiment of the disclosure, the variable resistor is inversely proportional to the control voltage Vcon; the AM-PM is inversely proportional to the variable resistance, and further, as shown in fig. 7, the gate Phase of the second transistor M2 is proportional to the control voltage Vcon within a certain range, that is, the AM-PM is proportional to the control voltage Vcon.

In the embodiment of the present disclosure, with reference to fig. 8, after the increasing original state curve of AM-PM is compensated by the compensation circuit module, that is, Vcon decreases after AM-PM increases, the on-resistance increases after AM-PM increases, and further the AM-PM decreases, and the change curve of AM-PM changes from an arc line segment to a straight segment.

In an embodiment of the present disclosure, a compensation method is provided, where a phase compensation circuit module provided in the above embodiment is used to compensate for a phase of an output signal of the above power amplifier, and the method includes: detecting an input signal of the signal input end through the detection component;

outputting a control signal by the control component according to the input signal detected by the detection component; the control signal is used for changing a resistance value accessed into the power amplifier, and the variable resistor forms a loop of the power amplifier and is used for forming a conduction resistance value of a transistor of the power amplifier; the on-resistance value of the transistor is used for decreasing when the phase of the output signal of the power amplifier is decreased and increasing when the phase of the output signal of the power amplifier is increased; and the increased or decreased conduction resistance value is used for changing the phase change curve of the output signal from an arc line segment to a straight segment.

In the embodiment of the present disclosure, the method further includes: