Reverse breakdown voltage tester and testing equipment

Abstract

The utility model provides a reverse breakdown voltage tester and testing equipment. The reverse breakdown voltage tester comprises a voltage input module, a current control module and a measuring module, the measuring module is connected with the voltage input module and the current control module. One end of the tested transistor is respectively connected with the voltage input module and the current control module; and the other end of the measured transistor is connected with the measuring module. In the mode, the universal meter and the variable resistor are connected in series to form the current control module, so that the reverse breakdown voltage test cost of the transistor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse breakdown voltage testing, in particular to a reverse breakdown voltage tester and testing equipment. Background Art

[0002] The reverse breakdown voltage of a transistor is one of the most important parameters of a transistor and is directly related to the performance of an application circuit. In the prior art, a source meter is often used to measure the reverse breakdown voltage of a transistor, but the cost of a source meter is relatively high. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a reverse breakdown voltage tester and a testing device, so as to reduce the cost of transistor reverse breakdown voltage testing.

[0004] In the first aspect, an embodiment of the utility model provides a reverse breakdown voltage tester, comprising: a voltage input module, a current control module and a measurement module; the measurement module is respectively connected to the voltage input module and the current control module; one end of the transistor under test is respectively connected to the voltage input module and the current control module; the other end of the transistor under test is connected to the measurement module; the voltage input module is used to continuously input the measurement voltage; the current control module is used to adjust the measurement current input to the measurement module according to the measurement voltage so that the measurement current value of the measurement current does not exceed the preset measurement current value; the measurement module is used to measure the real-time voltage of the transistor under test, and when the real-time voltage reaches the preset reading standard, the real-time voltage is determined to be the reverse breakdown voltage of the transistor under test; the voltage input module is also used to stop inputting the measurement voltage when the measurement voltage is equal to or greater than the reverse breakdown voltage.

[0005] Furthermore, the current control module includes a connected control chip and a first communication unit; the voltage input module includes a second communication unit; the first communication unit is communicatively connected to the second communication unit; the control chip is used to obtain the measured voltage value sent by the voltage input module in real time, and determine the shunt resistance value corresponding to the measurement module according to the measured voltage value and the preset measured current value.

[0006] Furthermore, the current control module includes a connected control chip and a first interface; the voltage input module includes a second interface; the current control module is connected to the second interface of the voltage input module through the first interface; the control chip is used to obtain the measured voltage value sent by the voltage input module in real time, and determine the shunt resistance value corresponding to the measurement module according to the measured voltage value and the preset measured current value.

[0007] Furthermore, the current control module includes a connected control chip and a measuring instrument; the measuring instrument is connected to the voltage input module; the control chip is used to obtain real-time measurement data measured by the measuring instrument; and the shunt resistance value corresponding to the measurement module is determined according to the real-time measurement data.

[0008] Furthermore, the current control module also includes a variable resistor; the variable resistor is connected to the control chip; the control chip is also used to adjust the real-time resistance value of the variable resistor according to the shunt resistance value until the real-time resistance value is equal to the shunt resistance value.

[0009] Furthermore, the voltage input module includes a second communication unit; the measurement module includes a third communication unit; the second communication unit and the third communication unit are communicatively connected; the measurement module is also used to obtain the reverse breakdown voltage sent by the measurement module through the third communication unit through the second communication unit.

[0010] Furthermore, the measuring module includes a multimeter.

[0011] In a second aspect, an embodiment of the utility model provides a testing device, including: a testing box, and also including any of the above-mentioned reverse breakdown voltage testers; the reverse breakdown voltage tester is arranged inside the testing box.

[0012] Furthermore, it also includes: a placement table fixed on the test box; the placement table is connected to the reverse breakdown voltage tester; the placement table is used to place the transistor to be tested.

[0013] Furthermore, it also includes: a voltage adjustment knob and a display device; the voltage adjustment knob is connected to the voltage input module in the reverse breakdown voltage tester; the display device is connected to the reverse breakdown voltage tester; the voltage adjustment knob is used to adjust the test voltage input by the voltage input module; the display device is used to display the reverse breakdown voltage of the transistor under test.

[0014] The utility model embodiment provides a reverse breakdown voltage tester and test equipment, including: a voltage input module, a current control module and a measurement module; the measurement module is respectively connected to the voltage input module and the current control module; one end of the transistor under test is respectively connected to the voltage input module and the current control module; the other end of the transistor under test is connected to the measurement module; the voltage input module is used to continuously input the measurement voltage; the current control module is used to adjust the measurement current input to the measurement module according to the measurement voltage so that the measurement current value of the measurement current does not exceed the preset measurement current value; the measurement module is used to measure the real-time voltage of the transistor under test, and when the real-time voltage reaches the preset reading standard, the real-time voltage is determined to be the reverse breakdown voltage of the transistor under test; the voltage input module is also used to stop inputting the measurement voltage when the measurement voltage is equal to or greater than the reverse breakdown voltage. In this method, the current control module is formed by connecting a multimeter and a variable resistor in series, thereby reducing the cost of the transistor reverse breakdown voltage test.

[0015] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a reverse breakdown voltage tester provided in Embodiment 1 of the present utility model;

[0019] Figure 2 A structural diagram of a first reverse breakdown voltage tester provided in Example 1 of the utility model;

[0020] Figure 3 A structural diagram of a second reverse breakdown voltage tester provided in the first embodiment of the utility model;

[0021] Figure 4 A structural diagram of a third reverse breakdown voltage tester provided in the first embodiment of the utility model;

[0022] Figure 5 A structural diagram of a voltage input module provided in Embodiment 1 of the present utility model;

[0023] Figure 6 This is a schematic diagram of the testing equipment provided in Example 2 of the utility model.

[0024] Icons: 1- voltage input module; 2- current control module; 3- measurement module; 4- transistor under test; 21- control chip; 22- first communication unit; 23- first interface; 24- measuring instrument; 25- variable resistor; 11- second communication unit; 12- second interface; 31- third communication unit; 5- test box; 6- reverse breakdown voltage tester; 7- placing table; 8- voltage adjustment knob; 9- display device. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] To facilitate understanding of this embodiment, the embodiment of the utility model is described in detail below.

[0027] Embodiment 1:

[0028] Figure 1 This is a schematic diagram of a reverse breakdown voltage tester provided in Example 1 of the utility model.

[0029] Reference Figure 1 The reverse breakdown voltage tester includes: a voltage input module 1, a current control module 2 and a measurement module 3.

[0030] The measuring module 3 is connected to the voltage input module 1 and the current control module 2 respectively; one end of the measured transistor 4 is connected to the voltage input module 1 and the current control module 2 respectively; the other end of the measured transistor 4 is connected to the measuring module 3 .

[0031] Here, the transistor 4 to be measured can be a diode or a triode. The measuring module 3 is a multimeter. The current control module 2 and the measuring module 3 are connected in series.

[0032] The positive voltage pole of the multimeter is connected to the current control module 2, and the negative voltage pole of the multimeter is connected to the other end of the transistor 4 to be measured and grounded.

[0033] The voltage input module 1 is used for continuously inputting the measurement voltage.

[0034] Here, the voltage input module 1 includes a tester, and the tester continuously inputs a measurement voltage within a preset voltage range according to a preset voltage input rule, wherein the preset voltage input rule and the preset voltage range are both preset according to actual needs.

[0035] Specifically, the preset voltage input rule may be to start from a low voltage and gradually increase the voltage until the reverse breakdown voltage of the transistor to be tested is reached. The preset voltage range may be set to 30V-50V.

[0036] The current control module 2 is used to adjust the measurement current input to the measurement module 3 according to the measurement voltage so that the measurement current value of the measurement current does not exceed a preset measurement current value.

[0037] Here, the preset measurement current value is determined according to the current threshold of the multimeter, and the preset measurement current value is less than the current threshold of the multimeter. For example, the preset measurement current value can be set to 1 / 2 of the current threshold of the multimeter, and when the current threshold is 1uA, the measurement current does not exceed 0.5uA.

[0038] If the internal resistance of the multimeter is 5MΩ and the current threshold is 1uA, when the measuring voltage is 50V, the measuring current is 50V / 5MΩ=10uA, and the measuring current exceeds the current threshold, then when the multimeter measures the reverse breakdown voltage of the transistor to be measured, it can only measure a voltage of 5V (5MΩ×1uA=5V), that is, the multimeter cannot detect a reverse breakdown voltage greater than 5V at this time, so the current control module 2 is connected in series to the multimeter to adjust the measuring current input to the multimeter through the current control module 2, so that the measuring current value of the measuring current does not exceed the preset measuring current value.

[0039] The measuring module 3 is used to measure the real-time voltage of the transistor 4 under test, and when the real-time voltage reaches a preset reading standard, the real-time voltage is determined to be the reverse breakdown voltage of the transistor 4 under test.

[0040] Here, the preset reading standard is set according to the actual situation, and can be set to read when the pointer on the multimeter changes significantly. Before the transistor to be tested reaches the reverse breakdown voltage, the reading on the multimeter is usually very small, because the transistor to be tested hardly conducts electricity under reverse bias. The current at this time is usually in the order of microamperes (uA) or lower. Once the voltage reaches the reverse breakdown voltage of the transistor to be tested, the transistor to be tested will begin to conduct electricity, and a significantly increased current or voltage reading will be displayed on the multimeter.

[0041] The voltage input module 1 is also used to stop inputting the measurement voltage when the measurement voltage is equal to or greater than the reverse breakdown voltage.

[0042] In one embodiment, referring to Figure 2 The current control module 2 includes a connected control chip 21 and a first communication unit 22 ; the voltage input module 1 includes a second communication unit 11 ; and the first communication unit 22 is communicatively connected to the second communication unit 11 .

[0043] Here, the second communication unit 11 in the voltage input module 1 is connected to the tester. The second communication unit 11 is used to send the measured voltage value of the measured voltage input by the tester to the control chip 21 of the current control module 2.

[0044] The control chip 21 is used to obtain the measured voltage value sent by the voltage input module 1 in real time, and determine the shunt resistance value corresponding to the measurement module 3 according to the measured voltage value and the preset measured current value.

[0045] Here, the preset measurement current value can be set as the control chip 21 determines the shunt resistance value of the multimeter at this time according to the real-time measurement voltage value and the preset measurement current value through the Ohm's law formula.

[0046] Furthermore, the current control module 2 also includes a variable resistor 25 ; the variable resistor 25 is connected to the control chip 21 .

[0047] The control chip 21 is further used to adjust the real-time resistance value of the variable resistor 25 according to the shunt resistance value until the real-time resistance value is equal to the shunt resistance value.

[0048] Here, the variable resistor 25 may be a resistor whose resistance value can be changed, such as a varistor, a thermistor, or a photoresistor.

[0049] In one embodiment, referring to Figure 3 The current control module 2 includes a connected control chip 21 and a first interface 23 ; the voltage input module 1 includes a second interface 12 ; the current control module 2 is connected to the second interface 12 of the voltage input module 1 through the first interface 23 .

[0050] Here, the current control module 2 is electrically connected to the voltage input module 1 via the first interface 23 and the second interface 12 .

[0051] The control chip 21 is used to obtain the measured voltage value sent by the voltage input module 1 in real time, and determine the shunt resistance value corresponding to the measurement module 3 according to the measured voltage value and the preset measured current value.

[0052] Furthermore, the current control module 2 also includes a variable resistor 25 ; the variable resistor 25 is connected to the control chip 21 .

[0053] The control chip 21 is further used to adjust the real-time resistance value of the variable resistor 25 according to the shunt resistance value until the real-time resistance value is equal to the shunt resistance value.

[0054] In one embodiment, referring to Figure 4 The current control module 2 includes a connected control chip 21 and a measuring instrument 24 ; the measuring instrument 24 is connected to the voltage input module 1 .

[0055] Here, the measuring instrument 24 may be a voltage measuring instrument 24 or a current measuring instrument 24 .

[0056] The voltage measuring instrument 24 may be a device capable of measuring voltage values, such as a voltmeter and an oscilloscope.

[0057] The current measuring device 24 may be a device capable of measuring a current value, such as an ammeter or a current sensor.

[0058] The control chip 21 is used to obtain the real-time measurement data measured by the measuring instrument 24; and determine the shunt resistance value corresponding to the measuring module 3 according to the real-time measurement data.

[0059] Here, when the measuring instrument 24 is a voltage measuring instrument 24, the control chip 21 obtains the real-time voltage measured by the voltage measuring instrument 24, and determines the shunt resistance value of the multimeter at this time according to the Ohm's law formula, the real-time voltage and the preset measured current value.

[0060] When the measuring instrument 24 is a current measuring instrument 24, the control chip 21 obtains the real-time current measured by the current measuring instrument 24, and determines the shunt resistance when adjusting the real-time current to the preset measured current value according to the correspondence between the preset resistance value of the variable resistor 25 and the current value.

[0061] Furthermore, the current control module 2 also includes a variable resistor 25 ; the variable resistor 25 is connected to the control chip 21 .

[0062] The control chip 21 is further used to adjust the real-time resistance value of the variable resistor 25 according to the shunt resistance value until the real-time resistance value is equal to the shunt resistance value.

[0063] In one embodiment, referring to Figure 5 The voltage input module 1 includes a second communication unit 11; the measurement module 3 includes a third communication unit 31; the second communication unit 11 and the third communication unit 31 are communicatively connected.

[0064] Here, the multimeter is connected to the third communication unit 31 .

[0065] The measuring module 3 is further configured to obtain, through the second communication unit 11 , the reverse breakdown voltage sent by the measuring module 3 through the third communication unit 31 .

[0066] Here, the multimeter sends the reverse breakdown voltage to the tester through the third communication unit 31, so that the tester stops inputting the measurement voltage.

[0067] The utility model embodiment provides a reverse breakdown voltage tester, including: a voltage input module, a current control module and a measurement module; the measurement module is respectively connected to the voltage input module and the current control module; one end of the transistor under test is respectively connected to the voltage input module and the current control module; the other end of the transistor under test is connected to the measurement module; the voltage input module is used to continuously input the measurement voltage; the current control module is used to adjust the measurement current input to the measurement module according to the measurement voltage so that the measurement current value of the measurement current does not exceed the preset measurement current value; the measurement module is used to measure the real-time voltage of the transistor under test, and when the real-time voltage reaches the preset reading standard, the real-time voltage is determined to be the reverse breakdown voltage of the transistor under test; the voltage input module is also used to stop inputting the measurement voltage when the measurement voltage is equal to or greater than the reverse breakdown voltage. In this method, the current control module is formed by connecting a multimeter and a variable resistor in series, thereby reducing the cost of the transistor reverse breakdown voltage test.

[0068] Embodiment 2:

[0069] Figure 6 This is a schematic diagram of the testing equipment provided in Example 2 of the utility model.

[0070] Reference Figure 6 The test equipment includes: a test box 5 , and also includes the above-mentioned reverse breakdown voltage tester 6 ; the reverse breakdown voltage tester 6 is arranged inside the test box 5 .

[0071] It also includes: a placement table 7 fixed on the test box 5; the placement table 7 is connected to the reverse breakdown voltage tester 6; the placement table 7 is used to place the transistor to be tested.

[0072] It also includes: a voltage adjustment knob 8 and a display device 9; the voltage adjustment knob 8 is connected to the voltage input module in the reverse breakdown voltage tester 6; and the display device 9 is connected to the reverse breakdown voltage tester 6.

[0073] The voltage adjustment knob 8 is used to adjust the test voltage input by the voltage input module.

[0074] The display device 9 is used to display the reverse breakdown voltage of the transistor under test.

[0075] The embodiment of the utility model provides a testing device, which forms a current control module by connecting a multimeter and a variable resistor in series, thereby reducing the cost of a transistor reverse breakdown voltage test.

[0076] The computer program product provided in the embodiment of the utility model includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0077] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0078] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the utility model can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the utility model. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0080] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0081] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A reverse breakdown voltage tester, characterized in that: include: A voltage input module, a current control module and a measuring module; the measuring module is connected to the voltage input module and the current control module respectively; one end of the transistor to be measured is connected to the voltage input module and the current control module respectively; the other end of the transistor to be measured is connected to the measuring module; The voltage input module is used to continuously input the measurement voltage; The current control module is used to adjust the measurement current input to the measurement module according to the measurement voltage so that the measurement current value of the measurement current does not exceed a preset measurement current value; The measuring module is used to measure the real-time voltage of the transistor under test, and when the real-time voltage reaches a preset reading standard, determine that the real-time voltage is the reverse breakdown voltage of the transistor under test; The voltage input module is further used to stop inputting the measurement voltage when the measurement voltage is equal to or greater than the reverse breakdown voltage.

2. The reverse breakdown voltage tester according to claim 1, characterized in that: The current control module includes a connected control chip and a first communication unit; the voltage input module includes a second communication unit; the first communication unit is in communication connection with the second communication unit; The control chip is used to obtain the measured voltage value sent by the voltage input module in real time, and determine the shunt resistance value corresponding to the measurement module according to the measured voltage value and the preset measured current value.

3. The reverse breakdown voltage tester according to claim 1, characterized in that: The current control module includes a connected control chip and a first interface; the voltage input module includes a second interface; the current control module is connected to the second interface of the voltage input module through the first interface; The control chip is used to obtain the measured voltage value sent by the voltage input module in real time, and determine the shunt resistance value corresponding to the measurement module according to the measured voltage value and the preset measured current value.

4. The reverse breakdown voltage tester according to claim 1, characterized in that: The current control module includes a connected control chip and a measuring instrument; the measuring instrument is connected to the voltage input module; The control chip is used to obtain real-time measurement data measured by the measuring instrument; and determine the shunt resistance value corresponding to the measurement module according to the real-time measurement data.

5. The reverse breakdown voltage tester according to any one of claim 2, claim 3 or claim 4, characterized in that: The current control module also includes a variable resistor; the variable resistor is connected to the control chip; The control chip is further used to adjust the real-time resistance value of the variable resistor according to the shunt resistance value until the real-time resistance value is equal to the shunt resistance value.

6. The reverse breakdown voltage tester according to claim 1, characterized in that: The voltage input module includes a second communication unit; the measurement module includes a third communication unit; the second communication unit is communicatively connected with the third communication unit; The measuring module is further configured to obtain, through the second communication unit, the reverse breakdown voltage sent by the measuring module through the third communication unit.

7. The reverse breakdown voltage tester according to claim 1, characterized in that: The measuring module includes a multimeter.

8. A testing device, characterized in that: include: The test box further comprises the reverse breakdown voltage tester according to any one of claims 1 to 7 above; The reverse breakdown voltage tester is arranged inside the test box.

9. The testing device according to claim 8, characterized in that Also includes: A placement table fixed on the test box; the placement table is connected to the reverse breakdown voltage tester; the placement table is used to place the transistor to be tested.

10. The testing device according to claim 8, characterized in that Also includes: A voltage adjustment knob and a display device; the voltage adjustment knob is connected to a voltage input module in the reverse breakdown voltage tester; the display device is connected to the reverse breakdown voltage tester; The voltage adjustment knob is used to adjust the test voltage input by the voltage input module; The display device is used to display the reverse breakdown voltage of the transistor under test.

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