kinds of radio frequency amplifier
阅读说明:本技术 一种射频放大器 (kinds of radio frequency amplifier ) 是由 万亮 臧振刚 王宇翔 石尚杰 于 2018-07-18 设计创作,主要内容包括:本发明公开了一种射频放大器。该射频放大器通过在输入偏置网络和偏置电源之间设置电压转换网络,将偏置电源输出的电压转换成输入偏置电压,实现单个电源同时为射频放大器提供输入偏置电压和输出偏置电压。并且通过电压转换网络控制信号输出端输出控制信号控制控制开关电路导通,使偏置电源输出的电压通过控制开关电路传输至输出偏置网络的输入端,为耗尽型放大器器件提供输出偏置网络。从而实现只有输入偏置网络的输入偏置电压加载到耗尽型放大器器件的输入端后,输出偏置网络才会为耗尽型放大器器件提供输出偏置网络,从而避免了因输入偏置电压过高而产生过大的输出偏置电流,进而烧毁器件的现象。(The invention discloses radio frequency amplifiers, which convert the voltage output by the bias power supply into the input bias voltage by arranging a voltage conversion network between the input bias network and the bias power supply, realize that a single power supply simultaneously provides the input bias voltage and the output bias voltage for the radio frequency amplifier, and control the conduction of a control switch circuit by the output control signal of a signal output end of a voltage conversion network control signal, so that the voltage output by the bias power supply is transmitted to the input end of the output bias network by controlling the switch circuit, and the output bias network is provided for a depletion type amplifier device.)
1, kinds of radio frequency amplifier, characterized by, including inputting the bias network, depletion mode amplifier device, outputting the bias network, voltage switching network, control switch circuit and bias power supply;
the output end of the input bias network is electrically connected with the input end of the depletion mode amplifier device;
the output end of the output bias network is electrically connected with the output end of the depletion mode amplifier device;
the voltage conversion network comprises an input end, an output end and a control signal output end, wherein the input end of the voltage conversion network is electrically connected with the output end of the bias power supply, and the output end of the voltage conversion network is electrically connected with the input end of the input bias network; the voltage conversion network is used for converting the power supply voltage output by the bias power supply output end into the input bias voltage of the input bias network;
the control switch circuit comprises an th end, a second end and a control end, the control end of the control switch circuit is electrically connected with the control signal output end of the voltage conversion network, the th end of the control switch circuit is electrically connected with the output end of the bias power supply, the second end of the control switch circuit is electrically connected with the input end of the output bias network, and the control switch circuit is used for transmitting the power supply voltage output by the bias power supply output end to the input end of the output bias network according to the control signal output by the control signal output end of the voltage conversion network.
2. The radio frequency amplifier of claim 1, wherein the voltage conversion network comprises a voltage conversion chip and a control signal output circuit;
the voltage conversion chip comprises an th voltage input end, a voltage output end and a voltage control end, wherein the th voltage input end of the voltage conversion chip is used as the input end of the voltage conversion network, and the voltage output end of the voltage conversion chip is used as the output end of the voltage conversion network;
the control signal input end of the control signal output circuit is electrically connected with the voltage control end of the voltage conversion chip, the input end of the control signal output circuit is electrically connected with the output end of the bias voltage, and the output end of the control signal output circuit is used as the control signal output end of the voltage conversion network; the control signal output circuit is used for outputting the control signal after the voltage control end of the voltage conversion chip outputs the signal.
3. The radio frequency amplifier of claim 2, wherein the voltage conversion chip further comprises a second voltage input and a switching transistor;
the control end of the switch transistor is electrically connected with the voltage output end of the voltage conversion chip, the th end of the switch transistor is electrically connected with the second voltage input end, and the second end of the switch transistor is used as the voltage control end of the voltage conversion chip.
4. The radio frequency amplifier of claim 3, wherein the switching transistor is a P-type transistor.
5. The radio frequency amplifier of claim 3, wherein the voltage conversion network further comprises a voltage divider sub-circuit;
an th input end of the voltage division sub-circuit is electrically connected with an output end of the bias power supply, a second input end of the voltage division sub-circuit is grounded, and an output end of the voltage division sub-circuit is electrically connected with a second voltage input end of the voltage conversion chip;
the voltage division sub-circuit is used for dividing the voltage output by the bias power supply and then inputting the divided voltage to the second voltage input end of the voltage conversion chip.
6. The RF amplifier of claim 5, wherein the voltage divider sub-circuit comprises a th voltage divider resistor and a second voltage divider resistor;
a th terminal of the th voltage-dividing resistor serves as a th input terminal of the voltage-dividing sub-circuit, a second terminal of the th voltage-dividing resistor is electrically connected to a th terminal of the second voltage-dividing resistor, a th terminal of the second voltage-dividing resistor serves as an output terminal of the voltage-dividing sub-circuit, and a second terminal of the second voltage-dividing resistor serves as a second input terminal of the voltage-dividing sub-circuit.
7. The radio frequency amplifier according to claim 2, wherein the control signal output circuit comprises an th transistor, a th resistor, a second resistor, a third resistor, and a th capacitor;
a terminal of the th resistor is used as a control signal input terminal of the control signal output circuit, and a second terminal of the th resistor is electrically connected with a control terminal of the th transistor;
the end of the th capacitor is electrically connected with the end of the th resistor, and the second end of the th capacitor is grounded;
a terminal of the th transistor is electrically connected to the terminal of the second resistor, and a second terminal of the th transistor is grounded;
the second end of the second resistor is electrically connected with the th end of the third resistor, the second end of the third resistor is electrically connected with the output end of the bias power supply, and the second end of the second resistor is used as the output end of the control signal output circuit.
8. The radio frequency amplifier of claim 1, further comprising a signal input, a signal output, an input matching network, and an output matching network;
the input end of the input matching network is electrically connected with the signal input end, and the output end of the input matching network is electrically connected with the input end of the depletion-mode amplifier device;
the input end of the output matching network is electrically connected with the output end of the depletion type amplifier device, and the output end of the output matching network is electrically connected with the signal output end.
9. The radio frequency amplifier of claim 1, wherein the control switch circuit is an th control switch, the th control switch includes a th terminal, a second terminal and a control terminal, the th control switch turns on or off between the th terminal and the second terminal according to a voltage of the control terminal;
the control terminal of the th control switch is used as the control terminal of the control switch circuit, the th control switch of the th control switch is used as the th terminal of the control switch circuit, and the second terminal of the th control switch is used as the second terminal of the control switch circuit.
10. The rf amplifier of claim 1, wherein the bias power supply is a dc power supply, and the bias power supply outputs a voltage greater than a voltage output by the output of the voltage conversion network.
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to radio frequency amplifiers.
Background
In the fields of wireless communication, radar, millimeter wave and the like, a radio frequency power amplifier is an essential core link in related equipment. The rf power amplifier needs to provide a proper bias voltage when operating. The input bias voltage of the radio frequency power amplifier is loaded on the input end of the amplifier device through the input bias network, and the output bias voltage is loaded on the output end of the amplifier device through the output bias network, so that the proper input bias voltage and output bias voltage are the premise that the radio frequency power amplifier normally works. The input bias of the depletion type radio frequency power amplifier is negative voltage, and the output bias is positive voltage. The input bias voltage of the depletion type radio frequency power amplifier needs deeper negative bias to close the depletion type radio frequency power amplifier, so that the depletion type radio frequency power amplifier is in an on state under the condition that the input end has no input, the voltage of the input end is zero and is far higher than the threshold voltage of the depletion type radio frequency power amplifier during normal operation, and if the output bias voltage is provided for the output end of the radio frequency power amplifier, overlarge output current is generated due to the overhigh input bias voltage of the output end, and the radio frequency amplifier is burnt.
Disclosure of Invention
The invention provides radio frequency amplifiers, which are used for providing output bias voltage after the preparation of the input bias voltage of the radio frequency amplifier is finished, thereby ensuring the time sequence of the input bias voltage and the output bias voltage and avoiding the phenomenon that the radio frequency amplifier is burnt.
, the embodiment of the invention provides kinds of radio frequency amplifiers, including an input bias network, a depletion mode amplifier device, an output bias network, a voltage conversion network, a control switch circuit and a bias power supply;
the output end of the input bias network is electrically connected with the input end of the depletion mode amplifier device;
the output end of the output bias network is electrically connected with the output end of the depletion mode amplifier device;
the voltage conversion network comprises an input end, an output end and a control signal output end, wherein the input end of the voltage conversion network is electrically connected with the output end of the bias power supply, and the output end of the voltage conversion network is electrically connected with the input end of the input bias network; the voltage conversion network is used for converting the power supply voltage output by the bias power supply output end into the input bias voltage of the input bias network;
the control switch circuit comprises an th end, a second end and a control end, the control end of the control switch circuit is electrically connected with the control signal output end of the voltage conversion network, the th end of the control switch circuit is electrically connected with the output end of the bias power supply, the second end of the control switch circuit is electrically connected with the input end of the output bias network, and the control switch circuit is used for transmitting the power supply voltage output by the bias power supply output end to the input end of the output bias network according to the control signal output by the control signal output end of the voltage conversion network.
Specifically, the voltage conversion network comprises a voltage conversion chip and a control signal output circuit;
the voltage conversion chip comprises an th voltage input end, a voltage output end and a voltage control end, wherein the th voltage input end of the voltage conversion chip is used as the input end of the voltage conversion network, and the voltage output end of the voltage conversion chip is used as the output end of the voltage conversion network;
the control signal input end of the control signal output circuit is electrically connected with the voltage control end of the voltage conversion chip, the input end of the control signal output circuit is electrically connected with the output end of the bias voltage, and the output end of the control signal output circuit is used as the control signal output end of the voltage conversion network; the control signal output circuit is used for outputting the control signal after the voltage control end of the voltage conversion chip outputs the signal.
Specifically, the voltage conversion chip further comprises a second voltage input terminal and a switching transistor;
the control end of the switch transistor is electrically connected with the voltage output end of the voltage conversion chip, the th end of the switch transistor is electrically connected with the second voltage input end, and the second end of the switch transistor is used as the voltage control end of the voltage conversion chip.
Specifically, the switching transistor is a P-type transistor.
Specifically, the voltage conversion network further comprises a voltage dividing sub-circuit;
an th input end of the voltage division sub-circuit is electrically connected with an output end of the bias power supply, a second input end of the voltage division sub-circuit is grounded, and an output end of the voltage division sub-circuit is electrically connected with a second voltage input end of the voltage conversion chip;
the voltage division sub-circuit is used for dividing the voltage output by the bias power supply and then inputting the divided voltage to the second voltage input end of the voltage conversion chip.
Specifically, the voltage dividing sub-circuit comprises an th voltage dividing resistor and a second voltage dividing resistor;
a th terminal of the th voltage-dividing resistor serves as a th input terminal of the voltage-dividing sub-circuit, a second terminal of the th voltage-dividing resistor is electrically connected to a th terminal of the second voltage-dividing resistor, a th terminal of the second voltage-dividing resistor serves as an output terminal of the voltage-dividing sub-circuit, and a second terminal of the second voltage-dividing resistor serves as a second input terminal of the voltage-dividing sub-circuit.
Specifically, the control signal output circuit includes an th transistor, a th resistor, a second resistor, a third resistor, and a th capacitor;
a terminal of the th resistor is used as a control signal input terminal of the control signal output circuit, and a second terminal of the th resistor is electrically connected with a control terminal of the th transistor;
the end of the th capacitor is electrically connected with the end of the th resistor, and the second end of the th capacitor is grounded;
a terminal of the th transistor is electrically connected to the terminal of the second resistor, and a second terminal of the th transistor is grounded;
the second end of the second resistor is electrically connected with the th end of the third resistor, the second end of the third resistor is electrically connected with the output end of the bias power supply, and the second end of the second resistor is used as the output end of the control signal output circuit.
Specifically, the radio frequency amplifier further comprises a signal input end, a signal output end, an input matching network and an output matching network;
the input end of the input matching network is electrically connected with the signal input end, and the output end of the input matching network is electrically connected with the input end of the depletion-mode amplifier device;
the input end of the output matching network is electrically connected with the output end of the depletion type amplifier device, and the output end of the output matching network is electrically connected with the signal output end.
Specifically, the control switch circuit is an th control switch, the th control switch comprises a th terminal, a second terminal and a control terminal, and the th control switch switches the th terminal and the second terminal of the th control switch on or off according to the voltage of the control terminal;
the control terminal of the th control switch is used as the control terminal of the control switch circuit, the th control switch of the th control switch is used as the th terminal of the control switch circuit, and the second terminal of the th control switch is used as the second terminal of the control switch circuit.
Specifically, the bias power supply is a direct current power supply, and the voltage output by the bias power supply is greater than the voltage output by the output end of the voltage conversion network.
The invention converts the voltage output by the bias power supply into the input bias voltage by arranging the voltage conversion network between the input bias network and the bias power supply, realizes that a single power supply simultaneously provides the input bias voltage and the output bias voltage for the radio frequency amplifier, and reduces the number of the power supplies. And the voltage conversion network control signal output end outputs a control signal to control the switch circuit to be conducted, so that the voltage output by the bias power supply is transmitted to the input end of the output bias network through the control switch circuit, and the output bias voltage is provided for the depletion-mode amplifier device. Therefore, the output bias network can provide the output bias voltage for the depletion type amplifier device only after the input bias voltage of the input bias network is loaded to the input end of the depletion type amplifier device, and the phenomenon that the device is burnt due to the fact that the output bias voltage is too high and too large output current is generated is avoided.
Drawings
Fig. 1 is a schematic structural diagram of kinds of radio frequency amplifiers provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of voltage conversion networks provided by the embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of voltage converting chips and peripheral circuits according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another voltage conversion networks provided in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of another voltage conversion networks provided in the embodiment of the present invention;
fig. 6 is a schematic structural diagram of another rf amplifiers provided in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of another kinds of rf amplifiers provided in the embodiment of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments herein described are merely illustrative of and not restrictive on the broad invention, and it should be further noted that for the purposes of description, only some, but not all, of the structures associated with the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of rf amplifiers according to an embodiment of the present invention, as shown in fig. 1, the rf amplifier includes an
The
The
Specifically, as shown in fig. 1, the
The
the
Before the signal is input at the signal input end Vin, the voltage at the input end Vin2 of the
In this process, the
According to the technical scheme of the embodiment, the voltage conversion network is arranged between the input bias network and the bias power supply, the voltage output by the bias power supply is converted into the input bias voltage, a single power supply simultaneously provides the input bias voltage and the output bias voltage for the radio frequency amplifier, and the number of the power supplies is reduced. And the voltage conversion network control signal output end outputs a control signal to control the switch circuit to be conducted, so that the voltage output by the bias power supply is transmitted to the input end of the output bias network through the control switch circuit, and the output bias voltage is provided for the depletion-mode amplifier device. Therefore, the output bias network can provide the output bias voltage for the depletion type amplifier device only after the input bias voltage of the input bias network is loaded to the input end of the depletion type amplifier device, and the phenomenon that the device is burnt due to the fact that the output bias voltage is too high and too large output current is generated is avoided.
On the basis of the above technical solution, fig. 2 is a schematic structural diagram of voltage conversion networks provided by an embodiment of the present invention, and with reference to fig. 1 and fig. 2, the
A control signal input terminal Cin of the control
Illustratively, fig. 3 is a schematic circuit diagram of voltage conversion chips and peripheral circuits provided by an embodiment of the invention, as shown in fig. 3, the model of the voltage conversion chip 141 may be TPS54260DGQ, and at this time, the PWRGD pin on the TPS54260DGQ is the voltage control terminal cout of the voltage conversion chip 141, and in order to make the TPS54260DGQ operate normally, the periphery of the TPS54260DGQ further includes other circuits or elements, and is electrically connected to other pins on the TPS54260DGQ, for example, an output inductor L1 is connected in series between the output terminal out1 and ground for storing electric energy and reducing ripple of the output current, so that the output current is smoothed, a freewheeling diode D1 is connected between the pH pin and the GND pin, when the internal power supply of the TPS54260DGQ is turned off, a current flows through the output inductor L1 to play a role of freewheeling, an initial capacitor is connected between the pH pin and the GND pin, an initial capacitor Cst is connected between the pH pin and the GND terminal, a boost voltage compensation transistor 82 inside the TPS 5482 is connected to the chip, and the output voltage compensation circuit 1412 is connected in parallel to make the output voltage conversion chip 141, and the output voltage compensation circuit for stabilizing the output of the output voltage compensation circuit 1412, and the output compensation circuit for stabilizing the output voltage compensation circuit for stabilizing the output pin.
Specifically, when the output terminal out1 of the
On the basis of the above technical solution, with continued reference to fig. 1 and fig. 2, the
Specifically, the input bias voltage of the depletion-mode amplifier device is negative voltage, and the voltage provided by the
On the basis of the above technical solution, fig. 4 is a schematic structural diagram of another voltage conversion networks provided by the embodiment of the present invention, as shown in fig. 4, the voltage conversion network further includes a voltage-dividing
Specifically, the
Based on the above technical solutions, fig. 5 is a schematic structural diagram of another voltage conversion network according to the embodiment of the present invention, and as shown in fig. 5, the control signal output circuit 142 includes a -th transistor T1, a 0-th resistor R1, a second resistor R2, a third resistor R3, and a 1-29-1-th capacitor C1, a second 3-end a of a 2-th resistor R1 is used as a control signal input terminal Cin of the control signal output circuit 142, a second end b of a 4-4 resistor is electrically connected to a control end C of a 5-th transistor T1, a 7-end f of a 6-th capacitor C1 is electrically connected to a -end a of a -th resistor R1, a second end g of a -capacitor C1 is grounded, a second end -end d of an -th transistor T1 is electrically connected to a -end k of a second resistor R2, a second end T -72-e-T is electrically connected to a ground, a second end g-R72-R72 is electrically connected to a second end of a power supply terminal , and a second end -R-p of a bias output terminal and a bias output terminal of a - .
Specifically, after the voltage control terminal Cout of the
On the basis of the above technical solutions, fig. 6 is a schematic structural diagram of another radio frequency amplifiers provided in the embodiments of the present invention, and with reference to fig. 5 and fig. 6, the
The control terminal of the th control switch K1 is used as the control terminal Kin of the control switch circuit, the th terminal of the th control switch K1 is used as the th terminal A1 of the control switch circuit, and the second terminal of the th control switch K1 is used as the second terminal A2 of the control switch circuit.
Specifically, the control terminal of the -th control switch K1 is electrically connected to the output terminal out2 of the control
On the basis of the above technical solutions, fig. 7 is a schematic structural diagram of another kinds of radio frequency amplifiers provided by the embodiment of the present invention, as shown in fig. 7, the radio frequency amplifier further includes an input matching network 170 and an output matching network 180, an input end of the input matching network 180 is electrically connected to the signal input end Vin, an output end of the input matching network 170 is electrically connected to the input end Vin2 of the depletion
The input of the output matching network 180 is electrically connected to the output terminal Vout2 of the
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
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