CN110261704B - Current test system and method of communication module - Google Patents

Current test system and method of communication module Download PDF

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CN110261704B
CN110261704B CN201910623093.6A CN201910623093A CN110261704B CN 110261704 B CN110261704 B CN 110261704B CN 201910623093 A CN201910623093 A CN 201910623093A CN 110261704 B CN110261704 B CN 110261704B
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voltage
effect transistor
field effect
electrically connected
triode
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CN110261704A (en
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陈冬冬
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Quectel Wireless Solutions Co Ltd
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Quectel Wireless Solutions Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/003Environmental or reliability tests

Abstract

The invention discloses a current test system and a method of a communication module, wherein the current test system comprises a power supply path selection module and a control module; the power supply path selection module comprises a voltage input end, a voltage output end and at least one voltage path corresponding to the working state, the control module is used for sending a path selection signal to the output pin according to the working state of the communication module, and the path selection signal is sent to the power supply path selection module through the output pin; the power supply path selection module is used for receiving a path selection signal and selecting a corresponding voltage path so that a voltage difference value between a voltage input end and a voltage output end is within a test range of the voltage measurement unit; the control module is further used for reading the voltage measuring unit and obtaining a voltage difference value, and is further used for obtaining the test current of the communication module according to the voltage difference value and the selected voltage path. The invention can realize the automatic test of the current of the communication module.

Description

Current test system and method of communication module
Technical Field
The present invention relates to the field of communications, and in particular, to a current testing system and method for a communication module.
Background
In the field of communication, the application range of a communication module is wider and wider, the performance requirement on the communication module is higher and higher, and in order to improve the working performance of the communication module, a large number of tests need to be performed on the communication module, wherein whether the working current of the communication module is normal or not is tested in the pressure test of the communication module in the environments of high temperature, low temperature and the like, and the method is an important test item for testing the communication performance of the communication module.
In the prior art, the current of the communication module is usually tested by manually monitoring the program-controlled current power supply, but the program-controlled current power supply is not a special current testing tool, the price of the program-controlled current power supply is also common and higher, the testing cost is too high, and manual testing is time-consuming and labor-consuming.
Disclosure of Invention
The invention provides a current testing system and method of a communication module, aiming at overcoming the defects of high cost, time and labor waste of a current testing mode of the communication module under pressure testing in the prior art.
The invention solves the technical problems through the following technical scheme:
a current test system of a communication module comprises a power supply path selection module and a control module;
the power supply path selection module comprises a voltage input end, a voltage output end and at least one voltage path corresponding to the working state, and the voltage output end is used for being electrically connected with a power supply input end of the communication module; the voltage input end is used for connecting an external power supply;
the control module is used for being in communication connection with an output pin of the communication module and a voltage measuring unit of the communication module respectively;
the voltage input end and the voltage output end are respectively electrically connected with the voltage measuring unit;
the control module is used for sending a path selection signal to the output pin according to the working state of the communication module, and the path selection signal is sent to the power supply path selection module by the output pin;
the power supply path selection module is used for receiving the path selection signal and selecting a corresponding voltage path so that a voltage difference value between the voltage input end and the voltage output end is within a test range of the voltage measurement unit;
the control module is further configured to read the voltage measurement unit and obtain the voltage difference, and is further configured to obtain a test current of the communication module according to the voltage difference and the selected voltage path.
Preferably, a load and a first switch are disposed in the voltage path, the first switch is configured to turn off or turn on the corresponding voltage path according to the path selection signal, and the control module is further configured to obtain the test current according to the voltage difference and a load value of the load in the voltage path that is turned on.
Preferably, the control module is further configured to be in communication connection with a control unit of the control module, and the control module is further configured to send a state control command to the control unit, where the state control command is used to control the control unit to enter the corresponding working state;
the control module is further configured to preset a corresponding relationship between the operating state and the voltage path, and send the path selection signal to the power supply path selection module according to the corresponding relationship and the current operating state, so as to turn on the corresponding voltage path.
Preferably, the operating state comprises at least one of an IDLE state, a slow clock state and a maximum power emission test state.
Preferably, the first switch comprises a first precision switch, the load comprises a first load, the first precision switch is used for corresponding to a first serial port in the output pin, the first switch comprises a first triode circuit and a first field effect transistor circuit, and the path selection signal comprises a high level signal and a low level signal;
the first triode circuit comprises a first triode, a first resistor and a second resistor, and the first field effect transistor circuit comprises a first field effect transistor and a third resistor;
one end of the first resistor is electrically connected with the first serial port;
the other end of the first resistor is electrically connected with the base electrode of the first triode;
one end of the second resistor is electrically connected with the base electrode of the first triode;
the other end of the second resistor is electrically connected with an emitting electrode of the first triode and grounded;
one end of the third resistor is electrically connected with the voltage input end;
the other end of the third resistor is electrically connected with the grid electrode of the first field effect transistor;
the collector of the first triode is electrically connected with the grid of the first field effect transistor;
the source electrode of the first field effect transistor is electrically connected with the voltage input end;
the drain electrode of the first field effect transistor is electrically connected with the power supply input end through the first load;
when the first serial port outputs the high level signal, the first triode and the first effect tube are both conducted, and the voltage output end outputs voltage;
when the first serial port outputs the low level signal, the first triode and the first effect tube are both cut off, and the voltage output end has no output voltage.
Preferably, the load is a resistive load, and the load values of the loads in different voltage paths are different.
Preferably, the power supply path selection module further includes a boot path, the boot path includes a second switch, and the second switch includes a second triode circuit and a second field-effect transistor circuit;
the second triode circuit comprises a second triode, a fourth resistor and a fifth resistor, and the second field effect transistor circuit comprises a second field effect transistor, a sixth resistor and a seventh resistor;
the base electrode of the second triode is electrically connected with a second serial port of the input pin through the fourth resistor;
one end of the fifth resistor is electrically connected with the base electrode of the second triode, and the other end of the fifth resistor is electrically connected with the emitting electrode of the second triode and grounded;
the voltage input end is electrically connected with a collector electrode of the second triode and a grid electrode of the second field effect transistor through the sixth resistor respectively;
the collector of the second triode is electrically connected with the grid of the second field effect transistor;
the source electrode of the second field effect transistor is electrically connected with the grid electrode of the third field effect transistor;
the drain electrode of the second field effect transistor is grounded;
the voltage input end is electrically connected with the source electrode of the second field effect transistor through the seventh resistor;
the power supply input end is electrically connected with the source electrode of the third field effect transistor, and the power supply output end is electrically connected with the drain electrode of the third field effect transistor;
when the second serial port outputs the high-level signal, the second triode is conducted, the second effect tube and the third effect tube are cut off, and the voltage output end has no output voltage;
when the second serial port outputs a low level signal, the second triode is cut off, the first effect tube is conducted, the third effect tube is conducted, and the voltage output end outputs voltage.
Preferably, the first switch further includes a plurality of second precision switches, the load further includes a second load corresponding to the second precision switches, each of the second precision switches is connected in parallel after being connected in series with the second load, the second precision switches are used for corresponding to a third serial port in the output pin, and the second precision switches include a third triode circuit and a third fet circuit;
the third triode circuit comprises a third triode, an eighth resistor and a ninth resistor, and the third field effect transistor circuit comprises a fourth field effect transistor, a fifth effect transistor and a tenth resistor;
one end of the eighth resistor is electrically connected with the third serial port;
the other end of the eighth resistor is electrically connected with the base electrode of the third triode;
one end of the ninth resistor is electrically connected with the base electrode of the third triode;
the other end of the ninth resistor is electrically connected with an emitting electrode of the third triode and grounded;
one end of the tenth resistor is electrically connected with the grid electrode of the fourth field effect transistor and the grid electrode of the fifth field effect transistor respectively;
the voltage input end is electrically connected with the other end of the tenth resistor and the source electrode of the fifth field effect transistor respectively;
the drain electrode of the fifth field effect transistor is electrically connected with the drain electrode of the fourth field effect transistor;
the collector electrode of the third triode is electrically connected with the grid electrode of the fourth field effect transistor;
the source electrode of the fourth field effect transistor is electrically connected with the voltage input end;
the drain electrode of the fourth field effect transistor is electrically connected with the power supply input end through the second load;
when the third serial port outputs the high-level signal, the third triode, the fourth effect tube and the fifth effect tube are all conducted, and the voltage output end outputs voltage;
when the third serial port outputs the low level signal, the third triode, the fourth effect tube and the fifth effect tube are all cut off, and the voltage output end has no output voltage.
A current testing method of a communication module is realized based on the current testing system of the communication module, and comprises the following steps:
electrically connecting a voltage input end of a power supply path selection module of the current test system with an external power supply;
electrically connecting a voltage output end of the power supply path selection module with a power supply input end of the communication module;
the control module of the current test system is respectively in communication connection with the output pin of the communication module and the voltage measurement unit;
electrically connecting the voltage measuring unit with the voltage input end and the voltage output end respectively;
the control module sends a state control command to the communication module, wherein the state control command is used for controlling the communication module to enter the corresponding working state;
the control module presets the corresponding relation between the working state of the communication module and a voltage path in the power supply path selection module;
the control module sends a path selection signal to the output pin according to the working state of the communication module and the corresponding relation;
the power supply path selection module receives the path selection signal sent by the output pin and conducts a corresponding voltage path according to the path selection signal;
and the control module reads the voltage measuring unit, acquires a voltage difference value between the voltage input end and the voltage input end, and obtains the test current of the communication module according to the voltage difference value and the selected voltage path.
The positive progress effects of the invention are as follows:
the power supply path selection module of the invention supplies power to the communication module by selecting different voltage paths, the power supply path selection module and the communication module form a circuit path, the current in the circuit path can be obtained by acquiring the voltages at two ends of the voltage path and combining the corresponding voltage paths, when the module is placed in a test environment, such as a high-temperature test environment, a low-temperature test environment and the like, the change of the current in the circuit path can be automatically monitored, if the current is kept within a preset change threshold range, the module works normally, and if the current change exceeds the preset change threshold range, the communication module works abnormally, thereby realizing the automatic test of the current of the communication module under various test environments.
Drawings
Fig. 1 is a block diagram of a current test system of a communication module according to embodiment 1 of the present invention.
Fig. 2 is a block diagram of a current testing system of a communication module according to embodiment 3 of the present invention.
Fig. 3 is a circuit diagram of a current testing system of a communication module according to embodiment 4 of the present invention.
Fig. 4 is a circuit diagram of a current testing system of a communication module according to embodiment 5 of the present invention.
Fig. 5 is a flowchart of a current testing method of a communication module according to embodiment 6 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The present embodiment provides a current testing system of a communication module, where a communication module 0 in the present embodiment includes a power input terminal 01, a voltage measuring unit 02, an output pin 03, and at least one working state, as shown in fig. 1, the current testing system of the communication module includes a power supply path selecting module 1 and a control module 2;
the power supply path selection module 1 comprises a voltage input terminal 11, a voltage output terminal 12 and at least one voltage path 13 corresponding to the working state.
The voltage output end 12 is used for being electrically connected with a power input end 01 of the communication module; the voltage input terminal 11 is used for connecting an external power supply. The external power source may be a common battery.
The control module 2 is used for being in communication connection with the output pin 03 of the communication module and the voltage measuring unit 02 of the communication module respectively.
The control module 2 is respectively in communication connection with the output pin 03 and the voltage measuring unit 02;
the voltage input end 11 and the voltage output end 12 are respectively electrically connected with the voltage measuring unit 02;
the control module 2 is configured to send a path selection signal to the output pin 03 according to the operating state of the communication module, where the path selection signal is sent to the power supply path selection module 1 by the output pin 03.
The power supply path selection module 1 is configured to receive a path selection signal and select a corresponding voltage path 13, so that a voltage difference between the voltage input terminal 11 and the voltage output terminal 12 is within a test range of the voltage measurement unit 02.
The control module 2 is configured to read the voltage measurement unit 02 and obtain a voltage difference, and further configured to obtain a test current of the communication module according to the voltage difference and the selected voltage path 13.
The power supply path selection module of the embodiment supplies power to the communication module by selecting different power supply paths, the power supply path selection module and the communication module form a circuit path, the current in the circuit path can be obtained by acquiring the voltage difference on the power supply path and combining the voltage difference with the corresponding power supply path, when the module is placed in a test environment, such as a high-temperature test environment, a low-temperature test environment and the like, the change of the current in the circuit path can be automatically monitored, if the current change is kept within a preset change threshold range, the module works normally, and if the current change exceeds the preset change threshold range, the communication module works abnormally, so that the automatic test of the current of the communication module in various test environments is realized.
Example 2
Compared with embodiment 1, the present embodiment is different in that the control module 2 is further configured to send a state control command to the control unit of the communication module 0, where the state control command is used to control the control unit to enter a corresponding operating state;
the control module 3 is further configured to preset a corresponding relationship between the operating state and the voltage path 13, send a path selection signal to the output pin 03 according to the corresponding relationship and the current operating state, and open the corresponding voltage path 13 by the output pin 03 according to the path selection signal.
Typically, the operating state of the communication module includes at least one of an IDLE state, a slow clock state, and a maximum power emission test state.
When the communication module respectively processes an IDLE state, a slow clock state and a maximum power emission test state, the current consumption of the voltage measurement unit and the output pin is very small, and when the communication module is subjected to pressure test, the current test of the communication module is slightly influenced and can be ignored.
In this embodiment, the control module presets a corresponding relationship between the operating state of the communication module and the voltage path, and opens the corresponding voltage path according to the corresponding relationship and the current operating state of the communication module. So as to realize the current test of the communication module under different working states.
Example 3
The present embodiment provides a current testing system of a communication module, and compared with embodiment 2, the present embodiment is different in that, more specifically, as shown in fig. 2, a first switch 131 and a load 132 are provided in a voltage path 13;
the first switch 131 is configured to turn off or turn on the corresponding voltage path 13 according to the path selection signal, and the control module 2 is further configured to obtain the test current according to the voltage difference and a load value of the load 132 in the turned-on voltage path 13.
The voltage path of the embodiment has simple structure and low cost, and can save the test cost.
Example 4
In this embodiment, compared with embodiment 3, the difference of the present embodiment is that the first switch 131 includes a first precision switch, the load includes a first load, as shown in fig. 3, the output pin 03 includes at least one first serial port, and the first serial ports correspond to the first precision switch 131 respectively.
The operating states of the communication module typically include an IDLE state, a slow clock state, and a maximum power emission test state. In this embodiment, for example, the current in the IDLE state and the current in the slow clock state are respectively tested, and in order to match the IDLE state and the slow clock state of the communication module, two serial ports, that is, the first serial ports GPIO1a and GPIO1b, and the two first precision switches 131a and 131b are correspondingly provided in this embodiment.
As shown in fig. 3, the first precision switch 131a includes a first triode circuit and a first field effect transistor circuit.
The path selection signal in this embodiment includes a high level signal and a low level signal;
the first triode circuit comprises a first triode T1, a first resistor R1 and a second resistor R2, and the first field effect transistor circuit comprises a first field effect transistor Q1 and a third resistor R3;
one end of the first resistor R1 is electrically connected with the first serial port GPIO 1;
the other end of the first resistor R1 is electrically connected with the base electrode of the first triode T1;
one end of the second resistor R2 is electrically connected with the base of the first triode T1;
the other end of the second resistor R2 is electrically connected with the emitter of the first triode T1 and is grounded;
one end of the third resistor R3 is electrically connected to the voltage input terminal 11;
the other end of the third resistor R3 is electrically connected with the grid of the first field effect transistor Q1;
the collector of the first triode T1 is electrically connected with the grid of the first field effect transistor Q1;
the source electrode of the first field effect transistor Q1 is electrically connected with the voltage input end 11;
the drain of the first field effect transistor Q1 is electrically connected to the power supply input terminal 01 through a resistive first load R8;
the first precision switch 131b and the first precision switch 131a have the same structure, and in order to match the IDLE state and the slow clock state of the communication module, the resistance values of the first loads R9 and R8 in the first precision switch 131b are set to be different.
Because the current consumption of the general communication module is usually 3-5 milliamperes when the general communication module is in the slow clock mode, the sampling precision of the general analog-to-digital conversion unit ADC is in mV level, at this time, the current tested by the voltage measurement units ADC1 and ADC2 is 3-5 milliamperes, assuming that the slow clock mode is associated with the first precision switch 131a, the resistance value of the resistive first load R8 is designed to be 50 ohms, and the resistance values of T1 and Q1 are very small in tens of milliohms, and can be ignored, in the actual test, the voltage difference measured by the ADC1 and ADC2 divided by the resistance value of R8 is the current of the communication module, when monitoring is performed in a specific environment, if the current is kept within a preset change threshold range, the slow clock mode state of the module is normal, and if the current change exceeds the preset change threshold range, the slow clock mode state is abnormal.
The current consumption of the communication module is 20-30 milliamperes in the IDLE mode, and assuming that the IDLE mode is corresponding to the first precision switch 131b, at this time, the current calculated and measured by the resistor R9 and the voltage difference measured by the voltage measurement unit ADC1 and ADC2 is 20-30 milliamperes, the resistance of the resistive load R9 is designed to be 10 ohms, and the voltage drop of 0.2-0.3 v generated by the 20-30 milliamperes current generated by the 10 ohm resistor does not affect the work of the communication module.
When actual test is performed, the communication module selects a corresponding path to perform matching in a corresponding working state, when the communication module enters a slow clock mode, the first serial port GPIO1 outputs a high-level signal, the first triode T1 of the first precision switch 131a and the first effect transistor Q1 are both turned on, at this time, the first precision switch 131a is turned on, the voltage output end 12 outputs voltage, and at this time, current test in the slow clock mode is performed.
When the test state is to be switched, for example, to an IDLE state, when a current test is performed, in order to ensure that the communication module is not powered off, the first serial port GPIO1b may be controlled to output a high level signal, the first transistor T1 and the first effect transistor Q1 of the first precision switch 131b are both turned on, at this time, the first precision switch 131b is turned on, the voltage output end 12 outputs a voltage, a preset time interval is set, after the 131b operates stably, the first serial port GPIO1a outputs a low level signal, the first transistor T1 and the first effect transistor Q1 of the first precision switch 131a are both turned off, and at this time, the current test in the IDLE mode may be performed.
In order to further improve the testing efficiency, the power supply path selection module 1 further includes a power-on path 14, and the power-on path 14 is used for automatically powering on and powering on the communication module.
The power-on path 14 includes a second switch including a second triode circuit and a second field effect transistor circuit; the control module also comprises a second serial GPIO 2.
The second triode circuit comprises a second triode T2, a fourth resistor R4 and a fifth resistor R5, and the second field effect transistor circuit comprises a second field effect transistor Q2, a third field effect transistor Q3, a sixth resistor R6 and a seventh resistor R7;
the second serial port GPIO2 is electrically connected to the base of the second transistor T2 through a fourth resistor R4;
one end of the fifth resistor R5 is electrically connected with the base electrode of the second triode T2, and the other end is electrically connected with the emitter electrode of the second triode T2 and grounded;
the voltage input end 11 is electrically connected with the collector of the second triode T2 and the gate of the second field-effect transistor Q2 through a sixth resistor R6;
the collector of the second triode T2 is electrically connected with the grid of the second field effect transistor Q2;
the source electrode of the second field effect transistor Q2 is electrically connected with the grid electrode of the third field effect transistor Q3;
the drain electrode of the second field effect transistor Q2 is grounded;
the voltage input end 11 is electrically connected with the source electrode of the second field effect Q2 tube through a seventh resistor R7;
the voltage input end 11 is electrically connected with the source electrode of the third field effect transistor Q3, and the power supply output end 12 is electrically connected with the drain electrode of the third field effect transistor Q3;
when the second serial port GPIO2 outputs a high level signal, the second transistor T2 is turned on, the second effect transistor Q2 and the third effect transistor Q3 are turned off, and the voltage output terminal 13 does not output voltage;
when the second serial GPIO2 outputs a low level signal, the second transistor T2 is turned off, the second effect transistor Q2 and the third effect transistor Q3 are both turned on, and the voltage output terminal 13 outputs a voltage.
When the power supply is powered on, the communication module is not powered on and started at the moment, and each transistor without driving capability, such as GPIO1a, GPIO1b and GPIO2, comprises a first precision switch T1 and a second precision switch T2 which are all closed; at this time, the second field effect Q2 is turned on, which causes the third effect transistor Q3 to be turned on, and the external power supply supplies power to the communication module through the power-on path 14, wherein the equivalent impedance of Q1 is 10 milliohms, and the communication module is normally powered on.
Example 5
Compared with embodiment 4, the difference of this embodiment is that, when the operating state of the communication module is the maximum power emission test state, the average current consumption of the communication module is 600 to 700 milliamperes, and in order to improve the accuracy of the voltage measured by the voltage measurement module and reduce the influence of the switches in the voltage path as much as possible, as shown in fig. 4, the first switch 131 further includes a plurality of second accuracy switches 131c, the load 132 further includes second loads corresponding to the second accuracy switches 131c, and each second accuracy switch is connected in parallel with a line after the second loads are connected in series.
The second precision switch is used for corresponding to a third serial port GPIO3 in the output pin and comprises a third triode circuit and a third field effect transistor circuit;
the third triode circuit comprises a third triode T3, an eighth resistor R10 and a ninth resistor R11, and the third field effect transistor circuit comprises a fourth field effect transistor Q4, a fifth field effect transistor Q5 and a tenth resistor R12;
one end of the eighth resistor R10 is electrically connected with the third serial port GPIO 3;
the other end of the eighth resistor R10 is electrically connected with the base of the third triode T3;
one end of the ninth resistor R11 is electrically connected with the base of the third triode T3;
the other end of the ninth resistor R11 is electrically connected with the emitter of the third triode T3 and is grounded;
one end of the tenth resistor R12 is electrically connected with the grid of the fourth field effect transistor Q4 and the grid of the fifth field effect transistor Q5 respectively;
the voltage input end 11 is respectively and electrically connected with the other end of the tenth resistor R12 and the source electrode of the fifth field effect transistor Q5;
the drain electrode of the fifth field effect transistor Q5 is electrically connected with the drain electrode of the fourth field effect transistor Q4;
the collector of the third triode T3 is electrically connected with the gate of the fourth field effect transistor Q4;
the source electrode of the fourth field effect transistor Q4 is electrically connected with the voltage input end 11;
the drain electrode of the fourth field effect transistor Q4 is electrically connected with the power supply input end 01 through a second load R13;
when the third serial port outputs a high-level signal, the third triode T3, the fourth effect tube Q4 and the fifth effect tube Q5 are all turned on, and the voltage output end outputs voltage.
When the third serial GPIO3 outputs a low level signal, the third transistor T3, the fourth effect transistor Q4, and the fifth effect transistor Q5 are all turned off, and no output voltage is provided at the voltage output terminal.
The second precision switch adopts a plurality of paths of field effect transistors which are connected in parallel with a larger resistor to reduce the influence of the switch on the voltage path, such as 10 paths of field effect transistors and a 500 milliohm resistor, the resistance value of the parallel field effect transistor is about 10 milliohm generally, and the value is far less than the resistance value of the 500 milliohm resistor, so the influence on the voltage path is small.
Example 6
The present embodiment provides a current testing method for a communication module, which is implemented based on the above current testing system for a communication module, as shown in fig. 5, the current testing method for a communication module includes:
step 51, electrically connecting a voltage input end of a power supply path selection module of the current test system with an external power supply;
step 52, electrically connecting the voltage output end of the power supply path selection module with the power supply input end of the communication module;
step 53, the control module of the current test system is respectively in communication connection with the output pin of the communication module, the voltage measurement unit and the control unit;
step 54, electrically connecting the voltage measuring unit with the voltage input end and the voltage output end respectively;
step 55, the control module sends a state control command to the communication module, wherein the state control command is used for controlling the communication module to enter a corresponding working state;
step 56, the control module presets the corresponding relation between the working state of the communication module and the voltage path in the power supply path selection module;
57, the control module sends a path selection signal to the output pin according to the working state and the corresponding relation of the communication module;
step 58, the power supply path selection module receives the path selection signal sent by the output pin and conducts the corresponding voltage path according to the path selection signal;
and step 59, the control module reads the voltage measuring unit, obtains the voltage difference value between the voltage input end and the voltage input end, and obtains the test current of the communication module according to the voltage difference value and the selected voltage path.
The power supply circuit comprises a power supply path selection module, a communication module, a power supply path selection module, a circuit path, a voltage detection module, a current detection module and a current detection module, wherein the power supply path selection module and the communication module form the circuit path, the voltage at two ends of a load on the load path is obtained and is combined with the load on the corresponding load path, the current in the circuit path can be obtained, when the module is placed in a test environment, such as a high-temperature test environment, a low-temperature test environment and the like, the change of the current in the circuit path can be automatically monitored, if the change of the current is kept within a preset change threshold range, the module works normally, and if the change of the current exceeds the preset change threshold range, the.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (9)

1. The current test system of the communication module is characterized by comprising a power supply path selection module and a control module;
the power supply path selection module comprises a voltage input end, a voltage output end and at least one voltage path corresponding to the working state, and the voltage output end is used for being electrically connected with the power supply input end of the communication module; the voltage input end is used for connecting an external power supply;
the control module is used for being in communication connection with an output pin of the communication module and a voltage measuring unit of the communication module respectively;
the voltage input end and the voltage output end are respectively electrically connected with the voltage measuring unit;
the control module is used for sending a path selection signal to the output pin according to the working state of the communication module, and the path selection signal is sent to the power supply path selection module by the output pin;
the power supply path selection module is used for receiving the path selection signal and selecting a corresponding voltage path so that a voltage difference value between the voltage input end and the voltage output end is within a test range of the voltage measurement unit;
the control module is further configured to read the voltage measurement unit and obtain the voltage difference, and is further configured to obtain a test current of the communication module according to the voltage difference and the selected voltage path.
2. The current testing system of claim 1, wherein a load and a first switch are disposed in the voltage path, the first switch is configured to turn off or turn on the corresponding voltage path according to the path selection signal, and the control module is further configured to obtain the test current according to the voltage difference and a load value of the load in the turned-on voltage path.
3. The current testing system of claim 1, wherein the control module is further configured to communicatively couple with a control unit of the control module, the control module is further configured to send a status control command to the control unit, the status control command being configured to control the control unit to enter the corresponding operating status;
the control module is further configured to preset a corresponding relationship between the operating state and the voltage path, and send the path selection signal to the power supply path selection module according to the corresponding relationship and the current operating state, so as to turn on the corresponding voltage path.
4. The current test system of the communication module of claim 1, wherein the operating state comprises at least one of an IDLE state, a slow clock state, and a maximum power emission test state.
5. The current testing system of the communication module of claim 2, wherein the first switch comprises a first precision switch, the load comprises a first load, the first precision switch is configured to correspond to a first serial port in the output pin, the first precision switch comprises a first triode circuit and a first field effect transistor circuit, and the path selection signal comprises a high level signal and a low level signal;
the first triode circuit comprises a first triode, a first resistor and a second resistor, and the first field effect transistor circuit comprises a first field effect transistor and a third resistor;
one end of the first resistor is electrically connected with the first serial port;
the other end of the first resistor is electrically connected with the base electrode of the first triode;
one end of the second resistor is electrically connected with the base electrode of the first triode;
the other end of the second resistor is electrically connected with an emitting electrode of the first triode and grounded;
one end of the third resistor is electrically connected with the voltage input end;
the other end of the third resistor is electrically connected with the grid electrode of the first field effect transistor;
the collector of the first triode is electrically connected with the grid of the first field effect transistor;
the source electrode of the first field effect transistor is electrically connected with the voltage input end;
the drain electrode of the first field effect transistor is electrically connected with the power supply input end through the first load;
when the first serial port outputs the high level signal, the first triode and the first field effect transistor are both conducted, and the voltage output end outputs voltage;
when the first serial port outputs the low level signal, the first triode and the first field effect transistor are both cut off, and the voltage output end has no output voltage.
6. The current testing system of claim 2, wherein the load is a resistive load, the load values of the load being different in different ones of the voltage paths.
7. The current testing system of claim 5, wherein the power supply path selection module further comprises a power-on path, the power-on path comprising a second switch, the second switch comprising a second triode circuit and a second field effect transistor circuit;
the second triode circuit comprises a second triode, a fourth resistor and a fifth resistor, and the second field effect transistor circuit comprises a second field effect transistor, a third field effect transistor, a sixth resistor and a seventh resistor;
the base electrode of the second triode is electrically connected with a second serial port of the output pin through the fourth resistor;
one end of the fifth resistor is electrically connected with the base electrode of the second triode, and the other end of the fifth resistor is electrically connected with the emitting electrode of the second triode and grounded;
the voltage input end is electrically connected with a collector electrode of the second triode and a grid electrode of the second field effect transistor through the sixth resistor respectively;
the collector of the second triode is electrically connected with the grid of the second field effect transistor;
the source electrode of the second field effect transistor is electrically connected with the grid electrode of the third field effect transistor;
the drain electrode of the second field effect transistor is grounded;
the voltage input end is electrically connected with the source electrode of the second field effect transistor through the seventh resistor;
the power supply input end is electrically connected with the source electrode of the third field effect transistor, and the power supply output end is electrically connected with the drain electrode of the third field effect transistor;
when the second serial port outputs the high-level signal, the second triode is conducted, the second field effect transistor and the third field effect transistor are cut off, and no output voltage exists at the voltage output end;
when the second serial port outputs a low level signal, the second triode is cut off, the first field effect transistor is conducted, the third field effect transistor is conducted, and the voltage output end outputs voltage.
8. The current testing system of the communication module according to claim 5, wherein the first switch further comprises a plurality of second precision switches, the load further comprises a second load corresponding to the second precision switches, each of the second precision switches is connected in parallel after being connected in series with the second load, the second precision switches are configured to correspond to a third serial port in the output pin, and the second precision switches comprise a third triode circuit and a third field effect transistor circuit;
the third triode circuit comprises a third triode, an eighth resistor and a ninth resistor, and the third field effect transistor circuit comprises a fourth field effect transistor, a fifth field effect transistor and a tenth resistor;
one end of the eighth resistor is electrically connected with the third serial port;
the other end of the eighth resistor is electrically connected with the base electrode of the third triode;
one end of the ninth resistor is electrically connected with the base electrode of the third triode;
the other end of the ninth resistor is electrically connected with an emitting electrode of the third triode and grounded;
one end of the tenth resistor is electrically connected with the grid electrode of the fourth field effect transistor and the grid electrode of the fifth field effect transistor respectively;
the voltage input end is electrically connected with the other end of the tenth resistor and the source electrode of the fifth field effect transistor respectively;
the drain electrode of the fifth field effect transistor is electrically connected with the drain electrode of the fourth field effect transistor;
the collector electrode of the third triode is electrically connected with the grid electrode of the fourth field effect transistor;
the source electrode of the fourth field effect transistor is electrically connected with the voltage input end;
the drain electrode of the fourth field effect transistor is electrically connected with the power supply input end through the second load;
when the third serial port outputs the high-level signal, the third triode, the fourth field-effect tube and the fifth field-effect tube are all conducted, and the voltage output end outputs voltage;
when the third serial port outputs the low level signal, the third triode, the fourth field effect transistor and the fifth field effect transistor are all cut off, and the voltage output end has no output voltage.
9. A current testing method of a communication module, wherein the current testing method of the communication module is implemented based on the current testing system of the communication module according to any one of claims 1 to 8, and the current testing method of the communication module comprises:
electrically connecting a voltage input end of a power supply path selection module of the current test system with an external power supply;
electrically connecting a voltage output end of the power supply path selection module with a power supply input end of the communication module;
the control module of the current test system is in communication connection with the output pin of the communication module, the voltage measurement unit and the control unit respectively;
electrically connecting the voltage measuring unit with the voltage input end and the voltage output end respectively;
the control module sends a state control command to the communication module, wherein the state control command is used for controlling the communication module to enter a corresponding working state;
the control module presets the corresponding relation between the working state of the communication module and a voltage path in the power supply path selection module;
the control module sends a path selection signal to the output pin according to the working state of the communication module and the corresponding relation;
the power supply path selection module receives the path selection signal sent by the output pin and conducts a corresponding voltage path according to the path selection signal;
and the control module reads the voltage measuring unit, acquires a voltage difference value between the voltage input end and the voltage input end, and obtains the test current of the communication module according to the voltage difference value and the selected voltage path.
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