阅读说明：本技术 一种5g通信设备、合分路器及其电流检测电路 (5G communication equipment, combiner-divider and current detection circuit thereof ) 是由 陈毅 于 2020-05-26 设计创作，主要内容包括：本申请公开了一种5G通信设备、合分路器及其电流检测电路,该电流检测电路包括电流采样电阻、调整模块和检测模块,电流采样电阻一端连接电流检测电路的输入端以及调整模块的第一输入端,电流采样电阻的另一端连接电流检测电路的输出端以及调整模块的第二输入端,调整模块耦接检测模块,检测模块通过调整模块检测到检测电压,并根据检测电压计算得到电流采样电阻的电流。本申请能够实现低成本检测电流,同时增大电压的检测范围。(The application discloses 5G communication equipment, close branching unit and current detection circuit thereof, this current detection circuit includes current sampling resistor, adjusting module and detection module, current sampling resistor's input and adjusting module's first input are connected to current detection circuit's input and current detection circuit, current sampling resistor's the other end is connected current detection circuit's output and adjusting module's second input, adjusting module is coupled detection module, detection module detects detection voltage through adjusting module, and calculate the electric current that obtains current sampling resistor according to detection voltage. The low-cost detection current can be realized, and the detection range of the voltage is enlarged.)

1. The utility model provides a current detection circuit, its characterized in that, current detection circuit includes current sampling resistance, adjustment module and detection module, current sampling resistance one end is connected current detection circuit's input and adjustment module's first input, current sampling resistance's the other end is connected current detection circuit's output and adjustment module's second input, adjustment module is coupled detection module, detection module passes through adjustment module detects detection voltage, and according to detection voltage calculates and obtains current sampling resistance's electric current.

2. The current detection circuit according to claim 1, wherein the adjustment module includes a triode pair transistor, a first resistor and a second resistor, a first end of the triode pair transistor is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the current sampling resistor, a second end of the triode pair transistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the other end of the current sampling resistor.

3. The current detection circuit of claim 2, wherein the pair of transistors comprises a first transistor and a second transistor with the same parameters, and a base of the first transistor and a base of the second transistor are connected to a collector of the first transistor;

or the base electrode of the first triode and the base electrode of the second triode are connected with the collector electrode of the second triode.

4. The current detection circuit of claim 2, wherein the first resistor has a resistance equal to the second resistor.

5. The current detection circuit of claim 2, wherein the regulation module further comprises a third resistor and a fourth resistor, and a third terminal and a fourth terminal of the triode-to-transistor pair are grounded through the third resistor and the fourth resistor, respectively.

6. The current detection circuit of claim 2, wherein the detection module comprises a third transistor and a fifth resistor, the third transistor is coupled to the pair of transistors, the third transistor is coupled to the fifth resistor, the third transistor outputs the detection voltage, and the fifth resistor is further coupled to ground.

7. The current sensing circuit of claim 6, wherein the sensing module further comprises: and the microcontroller receives the detection voltage output by the third triode and calculates the current according to the detection voltage.

8. A combiner-splitter, characterized in that the combiner-splitter comprises a low noise amplifier, a dc bypass and a current detection circuit according to any of claims 1-7, the current detection circuit being coupled to the low noise amplifier via the dc bypass for detecting a current of the low noise amplifier.

9. The combiner-divider of claim 8, wherein the current detection circuit determines whether the current is within a preset threshold range; and if so, the current detection circuit judges that the low-noise amplifier works normally.

10. A 5G communication device, wherein the 5G communication device comprises a power module, a transceiver module, a power management module, and the combiner-splitter of claim 8, wherein the power module is coupled to the power management module, the power management module is coupled to the transceiver module and the combiner-splitter, and the transceiver module is coupled to the combiner-splitter.

Technical Field

The application relates to the field of communication, in particular to 5G communication equipment, a combiner-divider and a current detection circuit thereof.

Background

In a 5G (5th-Generation, fifth Generation mobile communication technology) combiner-splitter, a dc bypass needs to be added in the combiner-splitter, and the base station power supply can provide a dc voltage to a lower-stage device, such as a tower amplifier, an antenna control unit, etc., via a dc bias device and the dc bypass function. In the practical application process, the output port may be short-circuited or the subsequent device may malfunction to cause abnormal current consumption, so the current detection circuit needs to be applied to the combining and splitting output port to detect the current consumption of the subsequent device. The tower amplifier low noise amplifier generally judges whether the low noise amplifier normally works according to the current consumption condition of the low noise amplifier, and if the working current of the low noise amplifier exceeds an upper threshold value or a lower threshold value, the low noise amplifier needs to be bypassed.

The existing current detection technical scheme generally adopts a ready-made high-end current detection integrated chip, and has higher cost.

Disclosure of Invention

The application provides a 5G communication equipment, a combiner-divider and a current detection circuit thereof to solve the problem of high cost in the prior art.

To solve the above technical problems. The technical scheme adopted by the application is as follows: the utility model provides a current detection circuit, this current detection circuit current sampling resistor, adjustment module and detection module, current detection circuit's input and adjustment module's first input are connected to current sampling resistor's one end, current detection circuit's output and adjustment module's second input are connected to current sampling resistor's the other end, adjustment module is coupled detection module, detection module detects the measuring voltage through adjustment module to calculate the electric current that obtains current sampling resistor according to the measuring voltage.

The adjusting module comprises a triode geminate transistor, a first resistor and a second resistor, wherein the first end of the triode geminate transistor is connected with one end of the first resistor, the other end of the first resistor is connected with one end of a current sampling resistor, the second end of the triode geminate transistor is connected with one end of the second resistor, and the other end of the second resistor is connected with the other end of the current sampling resistor.

The triode pair transistor comprises a first triode and a second triode which have the same parameters, and the base electrode of the first triode and the base electrode of the second triode are connected with the collector electrode of the first triode; or the base electrode of the first triode and the base electrode of the second triode are connected with the collector electrode of the second triode.

The resistance value of the first resistor is equal to that of the second resistor.

The adjusting module further comprises a third resistor and a fourth resistor, and the third end and the fourth end of the triode pair transistor are grounded through the third resistor and the fourth resistor respectively.

The detection module comprises a third triode and a fifth resistor, the third triode is coupled with the pair of transistors of the triode, the third triode is coupled with the fifth resistor, the third triode outputs detection voltage, and the fifth resistor is further grounded.

Wherein, the detection module further comprises: and the microcontroller receives the detection voltage output by the third triode and calculates to obtain the current according to the detection voltage.

In order to solve the above technical problem, another technical solution adopted by the present application is: the combiner-splitter comprises a low noise amplifier, a direct current bypass and the current detection circuit, wherein the current detection circuit is coupled with the low noise amplifier through the direct current bypass and is used for detecting the current of the low noise amplifier.

The current detection circuit judges whether the current is within a preset threshold range; if yes, the current detection circuit judges that the low noise amplifier works normally.

In order to solve the above technical problem, another technical solution adopted by the present application is: the 5G communication equipment comprises a power supply module, a transceiver module, a power supply management module and the combiner-splitter, wherein the power supply module is coupled with the power supply management module, the power supply management module is coupled with the transceiver module and the combiner-splitter, and the transceiver module is coupled with the combiner-splitter.

The beneficial effect of this application is: be different from prior art, this application current detection circuit includes current sampling resistor, adjustment module and detection module, current detection circuit's input and adjustment module's first input are connected to current sampling resistor's one end, current detection circuit's output and adjustment module's second input are connected to current sampling resistor's the other end, adjustment module is coupled detection module, detection module detects the testing voltage through adjustment module, and calculate the electric current that obtains current sampling resistor according to the testing voltage, therefore this current detection circuit can real-time detection electric current, need not high-end current detection integrated chip, reduce cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a circuit schematic of an embodiment of a current sense circuit of the present application;

FIG. 2 is a circuit schematic of another embodiment of the current sense circuit of the present application;

FIG. 3 is a circuit schematic of yet another embodiment of the current sense circuit of the present application;

FIG. 4 is a circuit diagram of an embodiment of the present disclosure;

fig. 5 is a circuit diagram of an embodiment of a communication device of 5G of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

In order to make those skilled in the art better understand the technical solution of the present application, the current detection circuit, the combiner-divider and the 5G communication device provided in the present application are further described in detail below with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, fig. 1 is a circuit diagram of a current detection circuit according to an embodiment of the present application. The current detection circuit 100 includes a current sampling resistor R, an adjustment module 110, and a detection module 120.

One end of the current sampling resistor R is connected with the input end U of the current detection circuit 100_inThe other end of the current sampling resistor R is connected with the output end U of the current detection circuit 100_out. The adjusting module 110 is coupled to the sampling resistor R and the detecting module 120. A first input end of the adjusting module 110 is connected to one end of the current sampling resistor R, and a second input end of the adjusting module 110 is connected to the other end of the current sampling resistor R. The detection module 120 detects the detection voltage through the adjustment module 110, and calculates the current of the current sampling resistor R according to the detection voltage.

The current detection circuit 100 of the embodiment can detect current in real time through the current sampling resistor R, the adjustment module 110 and the detection module 120, and does not need a high-end current detection integrated chip, thereby reducing cost.

Referring to fig. 2, fig. 2 is a circuit diagram of another embodiment of the current detection circuit of the present application. The adjusting module 110 includes a transistor pair 111, a first resistor R1, and a second resistor R2. The transistor pair 111 is coupled to one end of the current sampling resistor R through a first resistor R1, and the transistor pair 111 is coupled to the other end of the current sampling resistor R through a second resistor R2.

As shown in fig. 2, a first end of the triode pair transistor 111 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to one end of the current sampling resistor R, a second end of the triode pair transistor 111 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the other end of the current sampling resistor R, a third end of the triode pair transistor 111 is grounded, and a fourth end of the triode pair transistor 111 is grounded.

The emitter of the first triode Q1 is the first end of the triode-to-transistor 111; the emitter of the second triode Q2 is the second end of the triode-to-transistor 111; the base electrode of the first triode Q1 is the third end of the triode pair transistor 111; the collector of the second transistor Q2 is the fourth terminal of the transistor pair 111. The base of the first transistor Q1 and the base of the second transistor Q2 are connected to the collector of the first transistor Q1, which is further connected to ground. Alternatively, the base of the first transistor Q1 and the base of the second transistor Q2 may be connected to the collector of the second transistor Q2, which is further connected to ground.

The transistor pair transistor 111 is composed of a first transistor Q1 and a second transistor Q2, and the first transistor Q1 and the second transistor Q2 may be PNP transistors with the same parameters. In other embodiments, the first transistor Q1 and the second transistor Q2 may be NPN transistors with the same parameters.

The resistance of the first resistor R1 is the same as the resistance of the second resistor R2, and the pair transistor 111, the first resistor R1 and the second resistor R2 are combined to form a mirror current source, so that a stable current can be provided to the detection module 120.

The detection module 120 includes a third transistor Q3, a fifth resistor R5, and a microcontroller 121. The third transistor Q3 is coupled to the transistor pair 111, the third transistor Q3 is coupled to the fifth resistor R5, the fifth resistor R5 is further grounded, and the third transistor Q3 outputs a detection voltage U_sampTo the microcontroller 121.

Specifically, as shown in fig. 2, a base of the third transistor Q3 is connected to the fourth end of the transistor pair 111, an emitter of the third transistor Q3 is connected to the first end of the transistor pair 111, a collector of the third transistor Q3 is grounded via a fifth resistor R5, and a collector of the third transistor Q3 outputs a detection voltage U_samp. Alternatively, the base of the third transistor Q3 may be connected to the third terminal of the transistor pair 111. Alternatively, the collector of the third transistor Q3 may be connected to the first end of the transistor pair 111, the emitter of the third transistor Q3 may be grounded through a fifth resistor R5, and the emitter of the third transistor Q3 outputs the detection voltage U_samp. Alternatively, the collector of the third transistor Q3 may be connected to the second end of the transistor-pair 111. Alternatively, in other embodiments, the circuit connection may be performed by combining the above connection modes.

The third triode Q3 controls the large variation of the collector current through the tiny variation of the base current, and the collected current passing through the sampling resistor R is amplified. The collector of the third triode Q3 is connected in series with the fifth resistor R5 to provide a first dynamic voltage division for the detection output voltage. The third triode Q3 is a PNP triode. Optionally, in other embodiments, the third transistor Q3 may be an NPN transistor.

The fifth resistor R5 is a gain resistor, and the resolution of the current can be improved by adjusting the resistance of the fifth resistor R5.

Different from the prior art, this embodiment utilizes a small amount of simple components and parts to realize the function of measuring current through coupling current sampling resistor R, first resistance R1, second resistance R2, triode geminate transistor 111, third triode Q3 and fifth resistance R5, does not need the integrated current chip that use cost is higher and have the operational amplifier of scope limitation, can effective reduce cost.

The microcontroller 121 receives the detection voltage U output by the third transistor Q3_sampAnd according to the detected voltage U_sampAnd calculating to obtain the current.

The microcontroller 121 stores therein a calculation formula:

U_sampis R5/R1 (1), and

U_samp＝-(Is*R*R5/R1) (2)

when the third transistor Q3 is connected to the first resistor R1, the microcontroller 121 calculates the current of the sampling resistor R according to the formula (1); when the third transistor Q3 is connected to the second resistor R2, the microcontroller 121 calculates the current of the sampling resistor R according to equation (2). The microcontroller 121 detects the voltage U according to the output of the third transistor Q3_sampAnd the resistance values of the current sampling resistor R, the first resistor R1 and the fifth resistor R5 are calculated to obtain the current.

Compared with the prior art, the current can be directly calculated according to a formula, an integrated current chip is not required to be additionally arranged, and the cost can be effectively reduced; the circuit is simple and is beneficial to mass production.

Referring to fig. 3, fig. 3 is a circuit diagram of a current detection circuit according to still another embodiment of the present disclosure. On the basis of the above embodiments, the adjusting module 110 of this embodiment may further include a third resistor R3 and a fourth resistor R4.

The third end of the triode pair transistor 111 is grounded through a third resistor R3, and the fourth end of the triode pair transistor 111 is grounded through a fourth resistor R4. Optionally, the resistance of the third resistor R3 and the resistance of the fourth resistor R4 are equal. Alternatively, in other embodiments, only the third resistor R3 or the fourth resistor R4 may be provided.

The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all bias resistors, and the resistance values of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are set according to the collector current parameters of the triode pair transistor 111 and the ranges of the maximum saturation voltage and the input voltage.

Referring to fig. 4, fig. 4 is a circuit diagram of an embodiment of the combiner-divider 10 according to the present application. The combiner-divider 10 includes the current detection circuit 100, the low noise amplifier 200 and the dc bypass disclosed in the above embodiments.

Input end U of direct current bypass_inAnd an output terminal U of the DC bypass_outConnected across the low noise amplifier 200, the current detection circuit 100 is coupled to the low noise amplifier 200 through a dc bypass for detecting the current of the low noise amplifier 200.

The current detection circuit 100 further determines whether the current of the low noise amplifier 200 is within a preset threshold range; if yes, the current detection circuit 100 determines that the low noise amplifier 200 is working normally; if not, the current detection circuit 100 determines that the low noise amplifier 200 is operating abnormally. The current detection circuit 100 can monitor the working state of the low noise amplifier 200 in real time, and avoid the short circuit of the port of the combiner-divider 10 and the burning of components.

Referring to fig. 5, fig. 5 is a circuit diagram of an embodiment of a communication device of the present application 5G. The 5G communication device 1 includes the combiner/divider 10, the power management module 20, the power module 30 and the transceiver module 40 disclosed in the above embodiments.

The power module 30 is coupled to the power management module 20, the power management module 20 is coupled to the transceiver module 40 and the combiner/splitter 10, and the transceiver module 40 is coupled to the combiner/splitter 10. The power module 30 supplies power to the transceiver module 40 and the combiner-splitter 10 through the power management module 20, the transceiver module 40 can receive an input signal and send the input signal to the combiner-splitter 10, and the combiner-splitter 10 outputs an output signal. Alternatively, the combiner/splitter 10 may output the output signal to other post-stage devices, such as a tower amplifier or an antenna control unit.

The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.