Pull bias voltage acquisition device, pull bias voltage acquisition method and electronic equipment

Abstract

The invention discloses a bias voltage acquisition device, a bias voltage acquisition method and electronic equipment, and is applied to the technical field of circuit design, the device comprises a power supply module, a control module and a voltage regulation module, the voltage regulation module comprises a plurality of voltage regulation branches, and each voltage regulation branch comprises a switch unit and a voltage regulation resistor unit; the control module is used for traversing each control mode in a plurality of control modes and outputting a control signal corresponding to the control mode; the voltage regulating module is used for controlling a switch unit of a target voltage regulating branch in the plurality of voltage regulating branches to be switched on according to the control signal so as to regulate the voltage output by the power supply module through a voltage regulating resistor unit in the target voltage regulating branch to obtain a bias voltage equal to a first preset voltage; and the bias voltage is output to the to-be-tested module subjected to the voltage bias test. The device provided by the invention can accurately and efficiently provide the required bias voltage for the to-be-tested module.

Description

Technical Field

[0001] The present application belongs to the technical field of circuit design, and specifically relates to a bias voltage acquisition device, a bias voltage acquisition method and an electronic device. Background Art

[0002] In order to detect whether the performance of electronic products is stable when the output voltage of the power supply fluctuates, it is necessary to perform a bias voltage test on the electronic products.

[0003] In the related art, different voltage-dividing resistors can be manually welded, and the output voltage of the power supply can be adjusted through different voltage-dividing resistors to obtain different pull-bias voltages, and then the performance of the electronic product can be tested to see whether it is stable under different pull-bias voltages.

[0004] However, the method of manually welding the voltage divider resistor to obtain the pull-bias voltage has the problems of low efficiency and easy error. The related art lacks a device that can quickly and accurately obtain the pull-bias voltage. Summary of the invention

[0005] The present application aims to provide a pull-bias voltage acquisition device, a pull-bias voltage acquisition method and an electronic device, at least to solve the problem in the prior art that there is a lack of a device that can quickly and accurately obtain the pull-bias voltage.

[0006] In a first aspect, an embodiment of the present application discloses a pull-bias voltage acquisition device, the pull-bias voltage acquisition device includes a power module, a control module, and a voltage regulating module, the voltage regulating module is connected to the power module and the control module respectively; the voltage regulating module includes a plurality of voltage regulating branches, the voltage regulating branches include a switch unit and a voltage regulating resistor unit;

[0007] The control module is used to traverse each control mode of the multiple control modes and output a control signal corresponding to the control mode; one control mode corresponds to one first preset voltage;

[0008] The voltage regulating module is used to control the conduction of the switch unit of the target voltage regulating branch among the multiple voltage regulating branches according to the control signal, so as to adjust the voltage output by the power supply module through the voltage regulating resistor unit in the target voltage regulating branch, obtain a pull-bias voltage equal to the first preset voltage, and output the pull-bias voltage to the module to be tested for voltage pull-bias test.

[0009] In a second aspect, this embodiment provides a method for obtaining a bias voltage, which is applied to the device for obtaining a bias voltage in the first aspect, and the method includes:

[0010] Traversing each control mode among the multiple control modes, and acquiring a control signal corresponding to the control mode; one control mode corresponds to one first preset voltage;

[0011] Through the control signal, the switch unit of the target voltage regulating branch among the multiple voltage regulating branches is controlled to be turned on, so as to adjust the voltage output by the power supply module through the voltage regulating resistor unit in the target voltage regulating branch, obtain a pull-bias voltage equal to the first preset voltage, and output the pull-bias voltage to the module to be tested for voltage pull-bias test.

[0012] In a third aspect, this embodiment provides a computer-readable storage medium. When instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method described in the second aspect.

[0013] In a fourth aspect, this embodiment provides an electronic device, the electronic device comprising:

[0014] A bias voltage acquisition device as described in the first aspect.

[0015] In summary, by outputting a control signal corresponding to the control mode through the control module, and the voltage regulating module connected to the control module receives the control signal, the target voltage regulating circuit can be determined from multiple voltage regulating circuits, and the switch unit of the target voltage regulating branch can be controlled to be turned on, and the voltage output by the power module can be adjusted by the voltage regulating resistor unit in the target voltage regulating branch, so that the first preset voltage corresponding to the control mode can be quickly and accurately obtained, and it can be used as a pull-bias voltage and output to the module to be tested for the pull-bias voltage test. Furthermore, by traversing each of the multiple control modes, there is no need to manually weld the voltage-dividing resistor, and it can be automatically switched between the multiple control modes online to automatically obtain the pull-bias voltage corresponding to each control mode. The pull-bias power acquisition device of this embodiment can quickly and accurately obtain the pull-bias voltage, and can avoid the problem of low efficiency and low accuracy in obtaining the pull-bias voltage due to human factors when manually welding the voltage-dividing resistor in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached picture:

[0017] Figure 1 It is a structural block diagram of a bias voltage acquisition device provided in an embodiment of the present application;

[0018] Figure 2 is a structural block diagram of another bias voltage acquisition device provided in an embodiment of the present application;

[0019] Figure 3 This is a structural block diagram of another bias voltage acquisition device provided in an embodiment of the present application.

[0020] Figure 4 It is a circuit diagram of a bias voltage acquisition device provided in an embodiment of the present application;

[0021] Figure 5 It is a flowchart of a method for obtaining a bias voltage provided in an embodiment of the present application;

[0022] Figure 6 This is a flowchart of another method for obtaining a bias voltage provided in an embodiment of the present application;

[0023] Figure 7 is a block diagram of an electronic device according to an embodiment of the present application;

[0024] Figure 8 It is a block diagram of an electronic device of another embodiment provided by the embodiments of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0027] The method for obtaining the bias voltage provided in the embodiment of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0028] Some nouns or terms appearing in this application are subject to the following interpretations:

[0029] A complex programmable logic device (CPLD) is used to output a control signal corresponding to a control mode to a voltage regulator module, so as to control the voltage regulator module to output a pull-up voltage corresponding to the control mode.

[0030] The baseboard management controller (BMC) is used to store and analyze the bias voltage output by the voltage regulation module and determine whether the bias voltage meets the bias voltage requirement of the control module.

[0031] The power supply unit (PSU) is used to convert high-voltage alternating current into low-voltage direct current, and provide the low-voltage direct current to other modules in the bias voltage acquisition device.

[0032] The voltage regulator (VR) is used in conjunction with the voltage divider module to adjust the low-voltage DC power output by the PSU to a pull-bias voltage corresponding to the control module.

[0033] The Joint Test Action Group (JTAG) is a connection port between the CPLD and the MCU to realize data interaction between the two.

[0034] Figure 1 This is a bias voltage acquisition device provided in an embodiment of the present application, referring to Figure 1 The bias voltage acquisition device includes a power module 10, a control module 20, and a voltage regulating module 30. The voltage regulating module 30 is connected to the power module 10 and the control module 20 respectively.

[0035] The voltage regulating module 30 includes a plurality of voltage regulating branches 301 , and each voltage regulating branch 301 includes a switch unit 3011 and a voltage regulating resistor unit 3012 .

[0036] The control module 20 is used to traverse each control mode of the plurality of control modes and output a control signal corresponding to the control mode. One control mode corresponds to one first preset voltage;

[0037] The voltage regulating module 30 is used to control the switch unit 3011 of the target voltage regulating branch among multiple voltage regulating branches to be turned on according to the control signal, so as to adjust the voltage output by the power supply module 20 through the voltage regulating resistor unit 3012 in the target voltage regulating branch, obtain a pull-bias voltage equal to the first preset voltage, and output the pull-bias voltage to the module to be tested 40 for performing voltage pull-bias test.

[0038] For example, the control module 20 may be a module composed of a microcontroller CPLD and a baseboard management controller BMC, or may be a high-performance microcontroller (Microcontroller Unit, MCU) with digital signal processing capability, or may be other control modules with digital signal processing function.

[0039] For example, the voltage regulating resistor unit 3012 may include multiple voltage regulating resistors connected in series, and the voltage regulating resistor unit is respectively connected to the switch unit and the power module, and is used to regulate the voltage output by the power module when the switch unit is turned on to obtain a pull-up voltage corresponding to the voltage regulating branch.

[0040] The control mode may include a forward bias mode, a negative bias mode, or a normal mode. Furthermore, when the current control mode is the forward bias mode, the control module outputs a control signal corresponding to the forward bias mode, and the voltage regulating module outputs a forward bias voltage higher than the standard voltage according to the control signal; when the current control mode is the negative bias mode, the control module outputs a control signal corresponding to the negative bias mode, and the voltage regulating module outputs a forward bias voltage lower than the standard voltage according to the control signal; when the current control mode is the forward bias mode, the control module outputs a control signal corresponding to the forward bias mode, and the voltage regulating module outputs a forward bias voltage higher than the standard voltage according to the control signal; when the current control mode is the normal mode, the control module outputs a control signal corresponding to the normal mode, and the voltage regulating module outputs a forward bias voltage equal to the standard voltage according to the control signal. Wherein, the standard voltage is the normal power supply voltage of the module to be tested.

[0041] By way of example, the module to be tested may be a switch, a server, a network card, or a module in other electronic devices, which is not limited here.

[0042] The voltage pull-off test changes the power supply voltage of the electronic device to be tested and tests the performance of the device under different power supply voltages, thereby evaluating the performance stability and reliability of the device to be tested. Therefore, the voltage pull-off test is very important in the research and development stage of electronic equipment.

[0043] In the related art, when performing voltage bias test on electronic devices such as switches, servers, and network cards, it is necessary to obtain different voltage-dividing resistors through manual welding methods, and obtain different bias voltages by welding different voltage-dividing resistors, so as to perform voltage bias test according to different bias voltages. However, this method has the following problems: when the number of power supplies that need to be tested for bias is relatively large, the wind pressure resistors need to be replaced frequently, which will cause a waste of time and labor costs; when manually welding the voltage-dividing resistors, it is easy to weld resistors with wrong resistance values, or the voltage-dividing resistors are poorly welded, which will cause the obtained bias voltage to be inaccurate, or even the bias voltage cannot be obtained, which will lead to test abnormalities.

[0044] In this embodiment, by outputting a control signal corresponding to the control mode through the control module, the voltage regulating module connected to the control module receives the control signal, and the target voltage regulating circuit can be determined from multiple voltage regulating circuits, and the switch unit of the target voltage regulating branch can be controlled to be turned on, and the voltage output by the power module can be adjusted by the voltage regulating resistor unit in the target voltage regulating branch, so that the first preset voltage corresponding to the control mode can be quickly and accurately obtained, and it can be used as a pull-bias voltage and output to the module to be tested for the pull-bias voltage test. Further, by traversing each of the multiple control modes, there is no need to manually weld the voltage-dividing resistor, and it can be automatically switched between the multiple control modes in an online manner to automatically obtain the pull-bias voltage corresponding to each control mode. The pull-bias power acquisition device of this embodiment can quickly and accurately obtain the pull-bias voltage, and can avoid the problem of low efficiency and low accuracy in obtaining the pull-bias voltage due to human factors when manually welding the voltage-dividing resistor in the related art.

[0045] Furthermore, based on the bias voltage acquisition device of this embodiment, the bias voltage can be automatically provided to the module to be tested that is undergoing the bias voltage test in an online manner, so that the module to be tested can perform the voltage bias test online, and the test is not affected by human factors when manually welding resistors.

[0046] In one embodiment, referring to Figure 2 The voltage regulating resistor unit 3012 includes a first resistor r1 and a second resistor r2, the first end of the first resistor r1 is connected to the power module 10 and the first end of the second resistor r2 respectively, the second end of the first resistor R1 is connected to the first end of the switch unit 3011, and the second end of the second resistor R2 is grounded (not shown in the figure).

[0047] The second end of the switch unit 3011 is connected to the output end of the voltage regulating module 30 , and the control end of the switch unit 3011 is connected to the control module 20 .

[0048] In this embodiment, the control end of the switch unit is connected to the control module for receiving a control signal sent by the control module, and the control signal can control the switch unit to be turned off or on through the control end. When the control signal controls the switch unit to be turned on, the first resistor and the second resistor can perform voltage regulation processing on the voltage output by the power module to obtain the bias voltage after voltage regulation. Based on this embodiment, the control module can control the switch unit in the target voltage regulation circuit to be turned on and the switch units in other voltage regulation circuits to be turned off through the control signal, thereby making the target voltage regulation circuit output the bias voltage corresponding to the control mode. The voltage regulating resistor unit has a simple structure and cooperates with the switch unit to quickly and accurately obtain the bias voltage under different voltage regulation modes.

[0049] In one embodiment, the control module is used to obtain multiple groups of control signals for the current control mode, send each group of control signals to the voltage regulating module, and obtain multiple bias voltages output by the voltage regulating module, wherein the control signals correspond to the bias voltages one by one.

[0050] For example, if the current control mode is the forward bias mode, 100 groups of control signals can be generated for the forward bias mode, and these 100 groups of control signals are sent to the voltage regulating module respectively, and 100 pull-bias voltages output by the voltage regulating module are obtained. For example, if the current control mode is the negative bias mode, 100 groups of control signals can be generated for the negative bias mode, and these 100 groups of control signals are sent to the voltage regulating module respectively, and 100 pull-bias voltages output by the voltage regulating module are obtained.

[0051] The control module is further used to obtain an average value of multiple bias voltages and a difference between the average value and a first preset voltage corresponding to the control mode, and output an error signal when the difference is greater than a preset voltage threshold. The error signal is used to reflect a failure of the bias voltage acquisition device.

[0052] For example, if the current control mode is the forward bias mode, after obtaining 100 bias voltages for the forward bias mode, the average value of the 100 bias voltages is calculated, and the difference between the average value and the first preset voltage is obtained. For example, the first preset voltage may be an ideal voltage corresponding to the forward bias mode.

[0053] For example, the ideal voltage in the forward bias mode is 1.05E, and the first preset voltage is 1.05E, where E is the standard power supply voltage of the module to be tested.

[0054] In this embodiment, multiple groups of control signals are generated for a control mode, multiple bias voltages generated by the voltage regulating module according to the multiple groups of control signals are obtained, and the average value of multiple bias power supplies is obtained. When the difference between the average value and the first preset voltage is greater than the preset voltage threshold, it means that the fluctuations between the multiple bias voltages are large, or some bias voltages exceed the bias voltage range required by the control mode, and this situation may be caused by a failure of the bias voltage acquisition device. In this case, an error signal is output, which can prompt the operation and maintenance personnel to perform fault detection on the bias voltage acquisition device to avoid outputting an erroneous bias voltage to the module to be tested, which affects the voltage bias test result of the module to be tested.

[0055] In one embodiment, the control module is further used to obtain a mode identifier of the control mode.

[0056] The control module is also used to obtain multiple groups of control signals for the next control mode and obtain multiple pull-bias voltages output by the voltage regulation module when the difference is less than or equal to the preset voltage threshold and, based on the mode identifier of the current control mode, it is determined that the current control mode is not the last control mode among the multiple control modes, until, under the new control mode, the difference between the average value of the multiple pull-bias voltages and the first preset voltage corresponding to the new control mode is less than or equal to the preset voltage threshold, and the new control mode is the last control mode among the multiple control modes.

[0057] In this embodiment, when the difference is less than or equal to the preset voltage threshold, it means that the fluctuations between the multiple bias voltages output under the current control mode are not large, and the bias voltage requirements of the current control mode are met, indicating that the bias voltage acquisition device is in normal operation and can be used to acquire the bias voltage. When it is determined that the current control mode is not the last one according to the mode identifier of the current control mode, it means that the traversal has not yet ended, and multiple groups of control signals are obtained for the next control mode, and multiple bias voltages output by the voltage regulating module according to the control signals are obtained. Under the new control mode, the difference between the average value of the multiple bias voltages and the first preset voltage corresponding to the new control mode is less than or equal to the preset voltage threshold, and the new control mode is the last control mode among the multiple control modes, indicating that the bias voltage acquisition device operates normally and has completed the traversal of the multiple control modes. Through this embodiment, the bias voltage of each bias mode can be automatically and comprehensively acquired, thereby meeting the test requirements of the module to be tested for the bias voltage under multiple bias modes.

[0058] In one embodiment, referring to Figure 3 The power module includes a power regulator VR, and the control module includes a control unit and a management unit. The control unit is a microcontroller CPLD, and the management unit is a baseboard management controller BMC. The baseboard management controller BMC includes a log subunit and a mirror subunit. The voltage regulation module includes a switch resistor network, and the switch resistor network includes a normal voltage resistor network, a positive bias voltage resistor network, and a negative bias voltage resistor network. Each resistor network includes a voltage regulating resistor and a switch (for example, an electronic analog switch).

[0059] The power module is used to supply power to the microcontroller CPLD, the baseboard management controller BMC, and the power regulator VR. The control module is used to control the power on and off of the power regulator VR through the microcontroller CPLD, and control the switch resistor network to select different resistor networks from the normal voltage resistor network, the positive bias voltage resistor network, and the negative bias voltage resistor network to achieve different voltage pull-bias modes.

[0060] The switch resistor network is used to realize the corresponding voltage biasing mode based on the voltage regulating resistor and the switch according to the closing mode of different switches.

[0061] The management unit is built based on the baseboard management controller BMC. It is used to collect the bias voltage output by the switch resistor network and store it in the log subunit. It is also used to upgrade the image file according to the multiple image files stored in the image file subunit, and to power on and off the baseboard management controller BMC.

[0062] Among them, the image file at least includes a control signal corresponding to the control mode. In this embodiment, after the image upgrade is used to obtain the pull-bias voltage corresponding to the current control mode, the image file of the current control mode is switched to the image file of the next control mode, so as to obtain the control signal corresponding to the next control mode according to the image file of the next control mode, and obtain the pull-bias voltage corresponding to the next control module according to the control signal.

[0063] For example, refer to Figure 3 The baseboard management controller BMC records the results of each voltage deviation test in real time according to the progress of the voltage deviation test for subsequent troubleshooting and location. The test results include the average value of each sampling, the count value and the upgrade result of the CPLD.

[0064] In one embodiment, the bias voltage acquisition device includes a power module, a control module and a plurality of voltage regulating modules, wherein the power module includes a power supply unit and a plurality of voltage regulating units.

[0065] The power supply unit is connected to each voltage regulating unit respectively, and is used to supply power to the voltage regulating unit.

[0066] The control module is connected to each voltage regulating unit respectively, and is used to provide an enable signal to the voltage regulating unit so that the voltage regulating unit regulates the voltage output by the power supply unit to a second preset voltage.

[0067] The control module is connected to each voltage regulating module respectively, and is used to traverse each control mode of the multiple control modes and output a control signal corresponding to the control mode to each voltage regulating module.

[0068] The voltage regulating module is connected to the module to be tested, and is used to adjust the voltage output by the power module through the voltage regulating resistor unit in the target voltage regulating branch to obtain the pull-bias voltage, and output the pull-bias voltage to the module to be tested connected to the voltage regulating module.

[0069] When there are multiple modules to be tested and each module to be tested has its own power supply unit, the device of this embodiment can be used to provide a pull-bias power supply that replaces the output voltage of the power supply unit for multiple modules to be tested based on the control signal corresponding to the control mode, so that the voltage pull-bias performance of multiple modules to be tested can be automatically tested at the same time, thereby improving the test efficiency of the voltage pull-bias test.

[0070] Furthermore, the power module includes a power supply unit and a voltage regulating unit, and the control module includes a control unit and a management unit.

[0071] The power supply unit is connected to the control unit and the management unit respectively, and is used to supply power to the control unit and the management unit.

[0072] The voltage regulating unit is connected to the power supply unit, and the enable signal input terminal of the voltage regulating unit is connected to the enable signal output terminal of the control unit;

[0073] The control unit is used to send an enable signal to the voltage regulating unit to control the voltage regulating unit to regulate the voltage output by the power supply unit to a second preset voltage.

[0074] For example, the second preset voltage may be equal to a standard supply voltage of the module to be tested, for example, 3.3 V, or other voltage values.

[0075] The control module comprises a plurality of control signal output terminals, and one of the control signal output terminals is connected to a control terminal of a switch unit in the voltage regulating branch.

[0076] The control module is used to obtain a control signal corresponding to a current control mode; the control signal includes a first sub-control signal for controlling the conduction of a switch unit in a target voltage regulation circuit, and a second sub-control signal for controlling the disconnection of a switch unit in other voltage regulation branches; one other voltage regulation branch corresponds to one second sub-control signal.

[0077] The control module is also used to send the first sub-control signal to the control end of the switch unit in the target voltage regulating branch, and send multiple second sub-control signals to the control end of the switch unit in each other voltage regulating branch, so as to control the switch unit in the target voltage regulating branch to be turned on, and control the switch units in other voltage regulating branches to be turned off, so that the target voltage regulating branch adjusts the second preset voltage through the voltage regulating resistor unit to obtain a pull-up voltage equal to the first preset voltage.

[0078] For example, refer to Figure 4 The power supply unit may be a PSU, the voltage regulation unit may be a VR, the control unit may be a CPLD, and the management unit may be a BMC.

[0079] The power supply unit PSU is connected to the BMC via a two-wire serial bus (Inter-Integrated Circuit, I2C).

[0080] The voltage regulating module includes three voltage regulating branches, namely the first voltage regulating branch, the second voltage regulating branch and the third voltage regulating branch. The first voltage regulating branch includes a switch unit SW1, a voltage regulating resistor R1 and a voltage regulating resistor R2; the second voltage regulating branch includes a switch unit SW2, a voltage regulating resistor R3 and a voltage regulating resistor R4; the third voltage regulating branch includes a switch unit SW3, a voltage regulating resistor R5 and a voltage regulating resistor R6.

[0081] The following takes the first voltage regulating branch as an example to illustrate the connection method of each unit in the voltage regulating branch. The first end of the voltage regulating resistor R1 is connected to the first end of the voltage regulating resistor R2 and the FB end of VR, the second end of the resistor R1 is connected to the first end of SW1, and the second end of the resistor R2 is grounded. The second end of SW1 is connected to the output end of the voltage regulating module, and the control end of SW1 is connected to the E1 end of the CPLD.

[0082] The input terminal VIN of the voltage regulating unit VR is connected to the power supply PSU, and the enable signal input terminal EN of the voltage regulating unit VR is connected to the enable signal output terminal IO of the control unit CPLD. The power supply PSU is equivalent to the power supply unit in the above embodiment.

[0083] After the control unit CPLD is powered on, an enable signal is output to the voltage regulating unit VR through the enable signal output terminal IO, so as to control the voltage regulating unit VR to regulate the voltage output by the PSU to a second preset voltage.

[0084] The control module CPLD includes a control signal output terminal E1, a control signal output terminal E2, and a control signal output terminal E3. The control signal output terminal E1 is connected to the switch unit SW1 in the first voltage regulation instruction, the control signal output terminal E2 is connected to the switch unit SW3 in the second voltage regulation branch, and the control signal output terminal E3 is connected to the switch unit SW3 in the third voltage regulation instruction.

[0085] When the current control mode is the forward bias mode, SW1 is turned on by the control signal, and a forward bias voltage is provided through the first voltage regulation branch; when the current control mode is the negative bias mode, SW2 is turned on by the control signal, and a forward bias voltage is provided through the second voltage regulation branch; when the current control mode is the normal mode, SW3 is turned on by the control signal, and a standard voltage is provided through the third voltage regulation branch.

[0086] It should be noted that Figure 5The embodiment shown is to provide a bias voltage for a module to be tested. When bias power needs to be provided for multiple modules to be tested, multiple VRs and multiple voltage regulating modules may be provided.

[0087] Among them, the IO end of the CPLD is simultaneously connected to the EN ends of multiple VRs, the E1 end is simultaneously connected to SW1 in multiple voltage regulating modules, the E2 end is simultaneously connected to SW2 in multiple voltage regulating modules, and the E3 end is simultaneously connected to SW3 in multiple voltage regulating modules.

[0088] Refer to the following Figure 4 , the control logic of the bias voltage acquisition device is exemplified.

[0089] After the system is powered on, the PSU converts 220V AC power into 12V DC power, and processes the converted 12V voltage through a multi-stage VR (not shown in the figure) to obtain the power supply voltage Power2, and provides Power2 to the CPLD and BMC. The PSU also inputs the 12V voltage to the VIN terminal of the VR, where the VR model can be MPQ8626GD-Z, the feedback terminal FB of the VR is connected to each resistor, the VOUT terminal of the VR is connected to each switch unit SW, and is connected to the module to be tested for voltage deviation test, so as to output the voltage Power1 to the module to be tested. Furthermore, the VR is combined with the voltage regulating module to convert the 12V voltage into the voltage Power1, and output it to the module to be tested.

[0090] It should be noted that the model of the voltage regulating unit may not be MPQ8626GD-Z, but may be other VR devices having a voltage stabilization function and an external voltage dividing function.

[0091] When the PSU outputs 12V DC voltage normally, the CPLD enables the VR output voltage Power1 through the IO terminal and simultaneously completes the initialization configuration of the interconnection ports E1, E2, E3 and JTAG.

[0092] The CPLD configures the pull-bias mode for the voltage regulating module by controlling the switch selection signal; wherein the switch selection signal includes E1, E2 and E3. The switch selection signal is used to control and receive the on or off state of the switch unit of the switch selection signal, for example, E1 is used to control the state of SW1, E2 is used to control the state of SW2, and E3 is used to control the state of SW3. For example, the switch units SW1, SW2 and SW3 can be electronic analog switches. Preferably, the model of the electronic analog switch can be 74LVC1G66.

[0093] For example, the pull-bias mode configured by the selection signal is shown in Table 1.

[0094] Table 1

[0095] Strobe signal Signal Level Pull mode Resistor Configuration Bias voltage E1 High level MODE1 R1 / R2 Forward bias voltage E2 High level MODE2 R3 / R4 Negative bias voltage E3 High level MODE3 R5 / R6 Normal voltage

[0096] Among them, E1, E2 and E1 represent the selection signals corresponding to the positive bias test mode, negative bias test mode and normal test mode respectively, and MODE1, MODE2 and MODE1 represent the positive bias test mode, negative bias test mode and normal test mode respectively. Among them, R1 and R2 are the first resistor and the second resistor in the first voltage regulating branch; R3 and R4 are the first resistor and the second resistor in the second voltage regulating branch; R5 and R6 are the first resistor and the second resistor in the third voltage regulating branch.

[0097] It should be noted that when the system power supply is normal, in the default state, the CPLD controls the E3 terminal to output a high level, referring to Table 1. In this case, the pull-up voltage is a normal voltage, where the normal voltage is the standard power supply voltage of the module to be tested.

[0098] Furthermore, when the E3 terminal outputs a low level and the E2 terminal outputs a high level, the pull bias voltage is a negative bias voltage, which is less than the standard power supply voltage; when the E3 terminal outputs a low level and the E1 terminal outputs a high level, the pull bias voltage is a positive bias voltage, which is greater than the standard power supply voltage;

[0099] Reference Figure 5 The embodiment of the present application provides a method for obtaining a bias voltage, which may include the following steps:

[0100] Step 101, traverse each control mode among multiple control modes, and obtain a control signal corresponding to the control mode.

[0101] Wherein, one control mode corresponds to one first preset voltage.

[0102] Specifically, each control mode in the plurality of control modes is traversed through the control module in the bias voltage acquisition device to acquire a control signal corresponding to the control mode.

[0103] Step 102, through the control signal, control the switch unit of the target voltage regulating branch among the multiple voltage regulating branches to be turned on, so as to adjust the voltage output by the power supply module through the voltage regulating resistor unit in the target voltage regulating branch, obtain a pull-bias voltage equal to the first preset voltage, and output the pull-bias voltage to the module to be tested for voltage pull-bias test.

[0104] In this embodiment, by outputting a control signal corresponding to the control mode through the control module, controlling the switch unit of the target voltage regulating branch to be turned on through the control signal, and adjusting the voltage output by the power module through the voltage regulating resistor unit in the target voltage regulating branch, the first preset voltage corresponding to the control mode can be quickly and accurately obtained, and it is used as a pull-bias voltage and output to the module to be tested for the pull-bias voltage test. Furthermore, by traversing each of the multiple control modes, it is not necessary to manually weld the voltage-dividing resistor, and it is possible to automatically switch between the multiple control modes online to automatically obtain the pull-bias voltage corresponding to each control mode. The pull-bias power acquisition device of this embodiment can quickly and accurately obtain the pull-bias voltage, and can avoid the problem of low efficiency and low accuracy in obtaining the pull-bias voltage due to human factors when manually welding the voltage-dividing resistor in the related art.

[0105] For example, the acquisition and control of the control signal corresponding to the control mode in step 101 includes:

[0106] Sub-step 1011, obtaining multiple groups of control signals for the current control mode.

[0107] For example, a CPLD image file corresponding to the current control mode may be obtained, and a control signal corresponding to the current control mode may be obtained from the CPLD image file.

[0108] After step 102, the method further includes:

[0109] Step 103, obtaining an average value of a plurality of bias voltages.

[0110] Wherein, the bias voltage corresponds to the control signal one by one;

[0111] Step 104: Obtain a difference between the average value and a first preset voltage corresponding to the control mode.

[0112] Specifically, a subtraction operation is performed on the average value and the first preset voltage to obtain a difference between the two.

[0113] Step 105: output an error signal when the difference is greater than a preset voltage threshold.

[0114] The error signal is used to reflect the failure of the bias voltage acquisition device.

[0115] For example, after step 104, the method further includes:

[0116] Step 106, obtaining the mode identifier of the current control mode.

[0117] For example, a count value is recorded in the control module, and the count value is used as a mode identifier of the control mode. Then, the count value corresponding to the current control mode is the mode identifier of the current control mode.

[0118] Step 107, when the difference is less than or equal to the preset voltage threshold, and based on the mode identifier of the current control mode, it is determined that the current control mode is not the last control mode among the multiple control modes, multiple groups of control signals for the next control mode are obtained, and multiple pull-bias voltages output by the voltage regulation module are obtained, until, under the new control mode, the difference between the average value of the multiple pull-bias voltages and the first preset voltage corresponding to the new control mode is less than or equal to the preset voltage threshold, and the new control mode is the last control mode among the multiple control modes.

[0119] The following takes the voltage bias mode including the positive bias, negative bias and normal modes as an example to further exemplify the bias voltage acquisition method implemented by the bias voltage acquisition device of the above embodiment.

[0120] For example, for each voltage bias mode, the initialization configuration of the CPLD is fixed and cannot be changed. Each time the power bias mode is switched, the CPLD firmware needs to be upgraded to the firmware corresponding to the voltage bias mode to be tested.

[0121] Furthermore, a CPLD image file is configured for each voltage bias mode, and the image file includes a control program for obtaining the bias voltage corresponding to the voltage bias mode. After obtaining the CPLD image files corresponding to each voltage bias mode, each CPLD image file can be uploaded to the BMC through the network, so that when the CPLD firmware of a certain power bias mode is upgraded, the CPLD image file corresponding to the voltage bias mode is called from the BMC through the CPLD. For example, the correspondence between the image file and the voltage bias mode is shown in Table 2.

[0122] Table 2

[0123] Serial number Mirror 1 Mirror Configuration Mode Power1 voltage status 1 IMAG1 E1=1,E2=E3=0 MODE1 Positive bias (1.05E) 2 IMAG2 E2=1,E1=E3=0 MODE2 Negative bias (0.95E) 3 IMAG3 E3=1,E1=E2=0 MODE3 Normal (E)

[0124] Among them, the Power voltage state is the state of the pull-bias voltage in the aforementioned embodiment. E represents the standard power supply voltage of the module to be tested. IMAG1, IMAG2 and IMAG3 represent the CPLD image files of the positive bias mode, negative bias mode and normal mode, respectively. E1, E2 and E1 represent the selection signals corresponding to the positive bias test mode, negative bias test mode and normal test mode, respectively. E1=1 indicates that the switch unit in the voltage regulating branch for providing the positive bias voltage is turned on; E2=1 indicates that the switch unit in the voltage regulating branch for providing the negative bias voltage is turned on; E3=1 indicates that the switch unit in the voltage regulating branch for providing the normal voltage is turned on. The selection signal is equal to 0, indicating that the switch unit in the corresponding voltage regulating branch is turned off.

[0125] Refer to the following Figure 6 , a method for obtaining the bias voltage is described, and the method may include the following steps:

[0126] Step S1, initializing the count value M of the upgrade times counter to make M=0.

[0127] Specifically, after the system is powered on, the count value M is initialized to control normal operation.

[0128] Step S2, initializing the system.

[0129] Specifically, all interconnection ports in the device are initialized.

[0130] Step S3, determine the voltage bias mode according to the count value. If M=0, proceed to step S8.

[0131] The count value M is equivalent to the mode identifier in the above embodiment. When M=0, the voltage pull-bias mode is the forward bias mode MODE1. At this time, the image in the CPLD is the default image file of the normal voltage mode. Therefore, the BMC calls the image file IMAG1 and upgrades the image file in the CPLD through the JTAG link to upgrade it to the forward bias test image version.

[0132] Step S4, if M=1, enter the forward bias test mode, and then enter step S9;

[0133] The count value is used as the mode identifier of the control mode. Referring to Table 1, M=1 indicates that the control mode is the forward bias test mode.

[0134] Step S5, if M=2, enter the negative bias test mode. Then enter step S13;

[0135] Referring to Table 1, M=2, indicating that the control mode is a negative bias test mode.

[0136] Step S6: If M=3, enter the normal test mode, and then enter step S16.

[0137] Referring to Table 1, M=3, indicating that the control mode is the normal test mode.

[0138] Step S7: if M=4, then perform a function test on the module to be tested and end the test.

[0139] M=4, indicating that all three test modes have been tested.

[0140] Step S8, upgrade the CPLD image IMAG1, control the whole board to power off, make M=M+1, and return to step S2.

[0141] The CPLD image file is effective when power is off. Therefore, after upgrading the CPLD image to IMAG1, the entire BMC board needs to be powered off and M=M+1 to set M to 1.

[0142] After the system is powered on again, because M=1, the system starts the forward bias test.

[0143] Step S9: The BMC collects the voltage of the power supply under test 100 times.

[0144] The BMC collects the voltage value of Power1 100 times through the data collection port ADC0 of the management module, and calculates the average value A after the collection is completed.

[0145] Step S10, judging whether the power supply voltage under test 100 times meets the positive bias power supply range, if yes, proceeding to step S12, otherwise proceeding to step S11.

[0146] If the difference between the average value A of the power supply voltage tested 100 times and the standard voltage is less than or equal to the preset voltage threshold, it means A≈1.05E, indicating that the Power1 voltage has been pulled to the forward bias and the forward bias test is completed.

[0147] If the difference between the average value A of the power supply voltage tested 100 times and the standard voltage is greater than the preset voltage threshold, it means that the voltage deviation of Power1 has failed.

[0148] Step S11, determine that the voltage pull-off test fails, terminate the test, and eliminate the problem.

[0149] If the voltage deviation or voltage recovery fails, it means that there may be problems such as abnormal Power1 voltage or abnormal CPLD upgrade. To ensure the safety of the system, you need to terminate the deviation test and conduct troubleshooting.

[0150] Step S12, upgrade the CPLD image file to IMAG2, control the whole board to power off, so that M=M+1. Then return to step S2.

[0151] When the Power1 positive bias test is completed, the system enters the voltage negative bias mode (MODE2) from the positive bias mode (MODE1). At this time, the BMC upgrades the CPLD internal image to the negative bias test image (IMAG2).

[0152] After the upgrade is completed, the entire board is powered off to make the image take effect, and M=2 is set; after the system is powered on again and initialized, because M=2, the system starts the negative bias test.

[0153] Step S13: The BMC collects the voltage of the power supply under test 100 times.

[0154] The BMC collects the voltage value of Power1 100 times through the internal ADC Channel0 and calculates the average value B.

[0155] Step S14, judging whether the power supply voltage tested 100 times meets the negative bias power supply range, if yes, proceeding to step S15, otherwise proceeding to step S11.

[0156] If the difference between the average value B of the power supply voltage tested 100 times and the standard voltage is less than the preset voltage threshold, it means B≈0.95E, indicating that the Power1 voltage has been pulled to the negative bias and the negative bias test is completed.

[0157] If the difference between the average value B of the power supply voltage tested 100 times and the standard voltage is greater than or equal to the preset voltage threshold, it means that the voltage deviation of Power1 fails.

[0158] Step S15, upgrade the CPLD image file to IMAG3, control the whole board to power off, so that M=M+1. Then return to step S2.

[0159] When the positive bias and negative bias tests are completed, the system restores normal voltage for subsequent use. The system enters normal voltage mode (MODE3) from negative bias mode (MODE2). The BMC upgrades the CPLD to a normal image (IMAG3) through the JTAG link. After the upgrade is completed, the entire board is powered off and the number M=3 is set.

[0160] After the system is powered on and initialized, because M=3, the system starts normal testing.

[0161] Step S16: The BMC collects the voltage of the power supply under test 100 times.

[0162] The BMC collects the voltage value of Power1 100 times through the internal ADC Channel0 and calculates the average value B.

[0163] Step S17, judging whether the power supply voltage tested 100 times meets the negative bias power supply range, if yes, proceeding to step S18, otherwise proceeding to step S11.

[0164] The BMC collects the voltage value of Power1 100 times through the internal ADC Channel0 and calculates the average value C. If C≈E, it means that the voltage of Power1 has returned to normal; otherwise, the voltage of Power1 has failed to recover.

[0165] Step S18, set M=M+1 and return to step S2.

[0166] When the voltage returns to normal mode, M=4, the system ends the voltage deviation test and starts other normal function tests.

[0167] Compared with the traditional method, the method of this embodiment does not need to repeatedly weld the voltage-dividing resistor, which can save a lot of manpower and material resources and improve the test efficiency. At the same time, since there is no need to weld the voltage-dividing resistor, the influence of human factors on the test is reduced, and the fairness of the test results is guaranteed.

[0168] Reference Figure 7 , the electronic device 500 may include one or more of the following components: a processing component 502 , a memory 504 , a power component 506 , a multimedia component 508 , an audio component 510 , an input / output (I / O) interface 512 , a sensor component 514 , and a communication component 516 .

[0169] The processing component 502 generally controls the overall operation of the electronic device 500, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 502 may include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.

[0170] The memory 504 is used to store various types of data to support the operation of the electronic device 500. Examples of such data include instructions for any application or method operating on the electronic device 500, contact data, phone book data, messages, pictures, multimedia, etc. The memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0171] The power supply component 506 provides power to the various components of the electronic device 500. The power supply component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 500.

[0172] The multimedia component 508 includes an interface that provides an output interface between the electronic device 500 and the user. In some embodiments, the interface may include a liquid crystal display (LCD) and a touch panel (TP). If the interface includes a touch panel, the interface may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the electronic device 500 is in an operating mode, such as a shooting mode or a multimedia mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0173] The audio component 510 is used to output and / or input audio signals. For example, the audio component 510 includes a microphone (MIC), and when the electronic device 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is used to receive an external audio signal. The received audio signal can be further stored in the memory 504 or sent via the communication component 516. In some embodiments, the audio component 510 also includes a speaker for outputting audio signals.

[0174] The input / output I / O interface 512 provides an interface between the processing component 502 and the peripheral interface module, which may be a keyboard, a click wheel, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0175] The sensor assembly 514 includes one or more sensors for providing various aspects of status assessment for the electronic device 500. For example, the sensor assembly 515 can detect the open / closed state of the electronic device 500, the relative positioning of the components, such as the display and keypad of the electronic device 500, and the sensor assembly 514 can also detect the position change of the electronic device 500 or a component of the electronic device 500, the presence or absence of user contact with the electronic device 500, the orientation or acceleration / deceleration of the electronic device 500, and the temperature change of the electronic device 500. The sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 515 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0176] The communication component 516 is used to facilitate wired or wireless communication between the electronic device 500 and other devices. The electronic device 500 can access a wireless network based on a communication standard, such as WiFi, a carrier network (such as 2G, 3G, 4G or 5G), or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0177] In an exemplary embodiment, the electronic device 500 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to implement a method for obtaining a bias voltage provided in an embodiment of the present application.

[0178] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, and the instructions can be executed by a processor 520 of an electronic device 500 to perform the above method. For example, the non-transitory storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0179] Figure 86 is a block diagram of an electronic device 600 according to another embodiment of the present invention. For example, the electronic device 600 may be provided as a remote management device. Figure 8 The electronic device 600 includes a processing component 622, which further includes one or more processors, and a memory resource represented by a memory 632 for storing instructions executable by the processing component 622, such as an application. The application stored in the memory 632 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 622 is configured to execute instructions to perform a pull-bias voltage acquisition method provided in an embodiment of the present application.

[0180] The electronic device 600 may also include a power supply component 626 configured to perform power management of the electronic device 600, a wired or wireless network interface 650 configured to connect the electronic device 600 to a network, and an input / output (I / O) interface 658. The electronic device 600 may operate based on an operating system stored in the memory 632, such as Windows Server TM, Mac OS X TM, Unix TM, Linux TM, FreeBSD TM or the like.

[0181] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0182] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A bias voltage acquisition device, characterized in that: The bias voltage acquisition device includes a power module, a control module, and a voltage regulating module, wherein the voltage regulating module is connected to the power module and the control module respectively; the voltage regulating module includes a plurality of voltage regulating branches, wherein the voltage regulating branches include a switch unit and a voltage regulating resistor unit; The control module is used to traverse each control mode of the multiple control modes and output a control signal corresponding to the control mode; one control mode corresponds to one first preset voltage; The voltage regulating module is used to control the conduction of the switch unit of the target voltage regulating branch among the multiple voltage regulating branches according to the control signal, so as to adjust the voltage output by the power supply module through the voltage regulating resistor unit in the target voltage regulating branch, obtain a pull-bias voltage equal to the first preset voltage, and output the pull-bias voltage to the module to be tested for voltage pull-bias test.

2. The bias voltage acquisition device according to claim 1, characterized in that: The voltage regulating resistor unit includes a first resistor and a second resistor; The first end of the first resistor is connected to the power module and the first end of the second resistor respectively, the second end of the first resistor is connected to the first end of the switch unit, and the second end of the second resistor is grounded; The second end of the switch unit is connected to the output end of the voltage regulating module, and the control end of the switch unit is connected to the control module.

3. The bias voltage acquisition device according to claim 1, characterized in that: The control module is used to obtain multiple groups of control signals according to the current control mode, send each group of control signals to the voltage regulating module respectively, and obtain multiple bias voltages output by the voltage regulating module; the bias voltages correspond to the control signals one by one; The control module is also used to obtain an average value of multiple bias voltages and a difference between the average value and a first preset voltage corresponding to a control mode, and output an error signal when the difference is greater than a preset voltage threshold; the error signal is used to reflect a failure of the bias voltage acquisition device.

4. The bias voltage acquisition device according to claim 3, characterized in that: The control module is further used to obtain a mode identifier of a current control mode; The control module is also used to obtain multiple groups of control signals for the next control mode and obtain multiple pull-bias voltages output by the voltage regulation module when the difference is less than or equal to the preset voltage threshold and, based on the mode identifier of the current control mode, it is determined that the current control mode is not the last control mode among the multiple control modes, until, under the new control mode, the difference between the average value of the multiple pull-bias voltages and the first preset voltage corresponding to the new control mode is less than or equal to the preset voltage threshold, and the new control mode is the last control mode among the multiple control modes.

5. The bias voltage acquisition device according to claim 1, characterized in that: The control module includes a control unit and a management unit; the management unit stores a plurality of image files, the image files correspond to the control modules one by one, and the image files include control signals corresponding to the control modules; The management unit is used to call the image file of the next control mode after acquiring the bias voltage output by the voltage regulating module in the current control mode, and transmit the image file to the control unit; The control unit is used to obtain the control signal in the image file, so as to obtain the pull-bias voltage corresponding to the next control mode according to the control signal.

6. The bias voltage acquisition device according to claim 1, characterized in that: The power supply module includes a power supply unit and a voltage regulating unit, and the control module includes a control unit and a management unit; The power supply unit is connected to the control unit and the management unit respectively, and the power supply unit is used to supply power to the control unit and the management unit; The voltage regulating unit is connected to the power supply unit, and the enable signal input terminal of the voltage regulating unit is connected to the enable signal output terminal of the control unit; The control unit is used to send an enable signal to the voltage regulating unit to control the voltage regulating unit to regulate the voltage output by the power supply unit to a second preset voltage; The control module comprises a plurality of control signal output terminals, one of the control signal output terminals is connected to a control terminal of a switch unit in the voltage regulating branch; The control module is used to obtain a control signal corresponding to the current control mode; the control signal includes a first sub-control signal for controlling the switch unit in the target voltage regulation circuit to be turned on, and a second sub-control signal for controlling the switch unit in other voltage regulation branches to be turned off; one other voltage regulation branch corresponds to one second sub-control signal; The control module is also used to send the first sub-control signal to the control end of the switch unit in the target voltage regulating branch, and send multiple second sub-control signals to the control end of the switch unit in each other voltage regulating branch, so as to control the switch unit in the target voltage regulating branch to be turned on, and control the switch units in other voltage regulating branches to be turned off, so that the target voltage regulating branch adjusts the second preset voltage through the voltage regulating resistor unit to obtain a pull-up voltage equal to the first preset voltage.

7. A method for obtaining a bias voltage, applied to the device for obtaining a bias voltage according to any one of claims 1 to 6, characterized in that: The method comprises: Traversing each control mode among the multiple control modes, and acquiring a control signal corresponding to the control mode; one control mode corresponds to one first preset voltage; Through the control signal, the switch unit of the target voltage regulating branch among the multiple voltage regulating branches is controlled to be turned on, so as to adjust the voltage output by the power supply module through the voltage regulating resistor unit in the target voltage regulating branch, obtain a pull-bias voltage equal to the first preset voltage, and output the pull-bias voltage to the module to be tested for voltage pull-bias test.

8. The method according to claim 7, characterized in that Get and control the control signals corresponding to the mode, including: According to the current control mode, multiple groups of control signals are obtained; After the switch unit of a target voltage regulating branch among the multiple voltage regulating branches is controlled to be turned on by the control signal, so as to adjust the voltage output by the power supply module through the voltage regulating resistor unit in the target voltage regulating branch to obtain a pull-off voltage equal to the first preset voltage, the method further includes: Obtaining an average value of a plurality of bias voltages; wherein the bias voltages correspond to the control signals one by one; Obtaining a difference between the average value and a first preset voltage corresponding to the control mode; When the difference is greater than a preset voltage threshold, an error signal is output; the error signal is used to reflect the failure of the pull-bias voltage acquisition device.

9. The method according to claim 8, characterized in that After obtaining the difference between the average value and the first preset voltage corresponding to the current control mode, the method further includes: Get the mode identifier of the current control mode; When the difference is less than or equal to the preset voltage threshold, and according to the mode identifier of the current control mode, it is determined that the current control mode is not the last control mode among the multiple control modes, multiple groups of control signals for the next control mode are obtained, and multiple pull-bias voltages output by the voltage regulation module are obtained, until under the new control mode, the difference between the average value of the multiple pull-bias voltages and the first preset voltage corresponding to the new control mode is less than or equal to the preset voltage threshold, and the new control mode is the last control mode among the multiple control modes.

10. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform the method as claimed in any one of claims 7 to 9.

11. An electronic device, characterized in that: The electronic device comprises: The bias voltage acquisition device as described in any one of claims 1 to 6.

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