Step signal calibration method, device, system, calibrator and storage medium

Abstract

The present invention discloses a step signal calibration method, device, system, calibrator, and storage medium. The method comprises: preprocessing an input step signal according to a step signal preprocessing module to distinguish the step signal type and determine the step signal polarity; performing uniform processing and signal subtraction on the preprocessed step signal according to a step signal conversion module to obtain a step signal error; and calibrating the step signal on the tracer according to the step signal error. Unlike a step signal acquisition and calibration method, the present invention directly preprocesses the step signal output by the tracer and then returns it to the tracer for display, ultimately achieving step signal calibration. The circuit structure is simple and can achieve step signal calibration for general-purpose and small and medium-power semiconductor tube characteristic tracers, meeting the needs of the development of step signal calibration for small and medium-power semiconductor tube characteristic tracers.

Description

Technical Field

[0001] The present invention relates to a step signal calibration method, device, system, calibrator and storage medium, and belongs to the field of signal calibration. Background Art

[0002] By measuring the transistor under test, a tracer can display the transistor's input and output characteristic curves and measurement data. By analyzing the input and output characteristic curves, the transistor's characteristic parameters can be obtained. Given these characteristics, tracers are widely used in various fields, including electronic component production, scientific research, military affairs, and education. All departments and units involved in the design, manufacture, use, repair, measurement, and testing of semiconductor devices require tracers. Typical domestic tracer models include the BJ4822 high-power intelligent tracer from the Beijing Radio Instrument Factory, the XJ4834 high-power digital storage semiconductor tube tracer from Shanghai Xinjian Company, and the WQ4828A digital storage tracer from Hangzhou Wuqiang Company. Typical international tracer models include the CS-3000 series semiconductor curve tracer from Iwasaki Corporation of Japan and the TEKTRONIX 370 transistor tracer from Tektronix of the United States. These different types of tracers have low power, with a collector test current of only 10A, while the collector test current of high-power tracers reaches 1000A, the maximum test range of step current is 2A / step, the maximum range of step voltage is 2V / step, and the maximum test voltage reaches 3KV. With the continuous development of semiconductor technology, the development of tracers towards high power is a major trend.

[0003] There are two methods for calibrating a staircase signal. One is to use a differential oscilloscope for direct calibration. This involves inputting the base-emitter staircase signal directly into the oscilloscope for observation and performing calibration according to calibration specifications. The other method is to use a semiconductor tracer calibrator. There are two main methods for calibrating a staircase signal with a tracer calibrator. One method uses step signal acquisition, which is similar to the principle of oscilloscope calibration. The other method uses step normalization to calibrate the staircase signal.

[0004] Currently, the patent achievements include the following:

[0005] Patent 1: A high-power intelligent tracer calibrator 201610256951

[0006] Abstract: The present invention relates to a high-power intelligent tracer calibrator, which includes a main control module. A computer is connected to a USB communication module, and the main control module is connected to the USB communication module, a programmable reference power supply, and a timing module. The output end of the main control module is respectively connected to the input end of a trigger module, the input end of a multi-way selection matrix, and the input end of a sampling and holding circuit. The output end of the programmable reference power supply and the output end of the timing module are connected to the input end of the trigger module. The output end of the multi-way selection matrix is ​​respectively connected to the input end of a collector current calibration module, the input end of a step current calibration module, and the input end of a step voltage calibration module. The output end of the collector current calibration module, the output end of the step current calibration module, and the output end of the step voltage calibration module are respectively connected to the input end of the sampling and holding circuit. The output end of the sampling and holding circuit is connected to the input end of a programmable amplifier. The output end of the programmable amplifier is connected to the input end of a data processing circuit.

[0007] Patent 2: Transistor Characteristic Tracer Calibration Device 201610016703

[0008] Abstract: The present invention relates to a calibration device, in particular a transistor characteristic tracer calibration device, belonging to the technical field of transistor characteristic tracer calibration. The present invention comprises a constant current electronic load circuit for calibrating the collector current scanning factor and power consumption limiting resistor of a transistor characteristic tracer, and a constant voltage electronic load circuit for calibrating the base voltage scanning factor of a transistor characteristic tracer. The constant current electronic load circuit and the constant voltage electronic load circuit are both connected to a calibration selection control circuit, the input end of the calibration selection control circuit is connected to the calibration selection circuit, and the constant current electronic load circuit and the constant voltage electronic load circuit can be connected to the transistor characteristic tracer to be calibrated via a calibration connection circuit. The present invention has a compact structure, can effectively calibrate existing transistor characteristic tracers without calibration jacks, is easy to use, has a wide range of adaptability, and is safe and reliable.

[0009] In summary, the above calibration equipment is mainly used to calibrate high-power tracer step signals. Its circuit design and program control are relatively complex, and the current existing technology does not involve a specific solution for calibrating small and medium-power tracer step signals separately. Summary of the Invention

[0010] In view of this, the present invention provides a step signal calibration method, device, system, calibrator and storage medium. Different from the step signal acquisition and calibration method, the present invention directly preprocesses the step signal output by the tracer and then returns it to the tracer for display, thereby finally achieving step signal calibration. The circuit structure is simple and can realize step signal calibration of general-purpose and small and medium-power semiconductor tube characteristic tracers, meeting the needs of the development of step signal calibration of small and medium-power semiconductor tube characteristic tracers.

[0011] A first object of the present invention is to provide a step signal calibration method.

[0012] A second object of the present invention is to provide a step signal calibration device.

[0013] A third object of the present invention is to provide a step signal calibration system.

[0014] A fourth object of the present invention is to provide a calibrator for a small to medium power semiconductor tube characteristic tracer.

[0015] A fifth object of the present invention is to provide a storage medium.

[0016] The first object of the present invention can be achieved by adopting the following technical solutions:

[0017] A step signal calibration method for a small to medium power semiconductor tube characteristic tracer, the method comprising:

[0018] preprocessing the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal;

[0019] The pre-processed step signal is uniformly processed and signal subtracted according to the step signal conversion module to obtain the step signal error;

[0020] The step signal calibration is performed on the tracer according to the step signal error.

[0021] Furthermore, the step signal preprocessing module preprocesses the input step signal to distinguish the step signal type and determine the step signal polarity, including:

[0022] The relay is selected to distinguish the type of the step signal according to the step voltage / current of the input terminal;

[0023] A corresponding preprocessing subcircuit is selected according to the type of the step signal to determine the polarity of the step signal.

[0024] Furthermore, the selecting a corresponding preprocessing subcircuit according to the type of the step signal to determine the polarity of the step signal includes:

[0025] If the step signal type is a step voltage signal type, the step signal is processed by the step voltage / current two-selection relay and then introduced into the first NPN / PNP two-selection relay for primary polarity judgment; the step signal after the primary polarity judgment is processed by the corresponding voltage buffer circuit and then introduced into the second NPN / PNP two-selection relay for secondary polarity judgment;

[0026] If the step signal type is a step current signal type, the step signal is processed by the sampling resistor switching module and the differential circuit and then introduced into the above-mentioned step voltage / current two-choice relay to perform subsequent operations.

[0027] Furthermore, the step signal conversion module performs unified processing and signal subtraction on the pre-processed step signal to obtain a step signal error, including:

[0028] The step signal after the secondary polarity determination is introduced into a reverse proportional amplifier circuit including an adjustable feedback resistor to convert the step signals of different amplitudes into a step signal of 1V / step;

[0029] The converted step signal is subtracted from the standard 0-10V voltage signal according to the subtractor circuit to obtain the step signal error.

[0030] The second object of the present invention can be achieved by adopting the following technical solutions:

[0031] A step signal calibration device for a small to medium power semiconductor tube characteristic tracer, comprising:

[0032] a preprocessing module, configured to preprocess the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal;

[0033] A first calculation module is used to perform unified processing and signal subtraction on the pre-processed step signal according to the step signal conversion module to obtain a step signal error;

[0034] The second calculation module is used to perform step signal calibration on the tracer according to the step signal error.

[0035] The third object of the present invention can be achieved by adopting the following technical solutions:

[0036] A step signal calibration system for small and medium power semiconductor tube characteristic tracers includes a step signal preprocessing module, a step signal conversion module, and a control and error analysis module.

[0037] The step signal preprocessing module is used to preprocess the input step signal to distinguish the type of the step signal and determine the polarity of the step signal;

[0038] The step signal conversion module is used to perform unified processing and signal subtraction on the pre-processed step signal to obtain a step signal error;

[0039] The control and error analysis module is used to perform step signal calibration on the tracer according to the step signal error.

[0040] Furthermore, in the step signal preprocessing module, the input end step voltage / current selection relay, the step voltage / current two-choice relay, the first NPN / PNP two-choice relay, the voltage buffer module and the second NPN / PNP two-choice relay are connected in sequence; the sampling resistor switching module and the differential circuit form a loop; the control chip is connected to the control and error analysis module;

[0041] The sampling resistor switching module is connected to the input end step voltage / current selection relay;

[0042] The differential circuit is connected to a step voltage / current two-choice relay;

[0043] The control chip is connected to the input-end step voltage / current selection relay, the first NPN / PNP two-to-one relay, and the second NPN / PNP two-to-one relay.

[0044] Furthermore, the step signal conversion module includes a step signal output control module, a subtractor circuit, a voltage source module and a reverse proportional amplification circuit;

[0045] The step signal output control module, the subtractor circuit, and the voltage source module are connected in sequence, and the subtractor circuit is connected to the reverse proportional amplification circuit;

[0046] The reverse proportional amplification circuit is connected to a second NPN / PNP two-choice relay;

[0047] The control chip is connected to the voltage source module and the reverse proportional amplification circuit.

[0048] The fourth object of the present invention can be achieved by adopting the following technical solutions:

[0049] A calibrator for a small- to medium-power semiconductor tube characteristic tracer comprises the above-mentioned step signal calibration system.

[0050] The fifth object of the present invention can be achieved by adopting the following technical solutions:

[0051] A storage medium stores a program, and when the program is executed by a processor, the above-mentioned step signal calibration method is implemented.

[0052] The present invention has the following beneficial effects compared to the prior art:

[0053] The present invention is different from the step signal acquisition and calibration method. Instead, the step signal output by the tracer is uniformly preprocessed and then returned to the tracer for display, thereby ultimately achieving step signal calibration. The circuit structure is simple, and step signal calibration can be achieved for general-purpose and small and medium-power semiconductor tube characteristic tracers, meeting the needs of the development of step signal calibration for small and medium-power semiconductor tube characteristic tracers; and step voltage calibration of 10mV / step to 2V / step and step current of 1μA / step to 2A / step for semiconductor tube characteristic tracers can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0055] Figure 1 This is a structural block diagram of a step signal calibration system according to embodiment 1 of the present invention.

[0056] Figure 2 This is a specific structural diagram of the step signal calibration system according to embodiment 1 of the present invention.

[0057] Figure 3 Schematic diagram of the connection of the calibration step signal according to embodiment 1 of the present invention.

[0058] Figure 4 Flowchart of the step signal calibration method according to embodiment 1 of the present invention.

[0059] Figure 5 This is a structural block diagram of a step signal calibration device according to embodiment 2 of the present invention.

[0060] Figure 6 This is a structural block diagram of a computer device according to embodiment 3 of the present invention.

[0061] Among them, module 1 - step signal preprocessing module; module 2 - step signal conversion module; module 3 - control and error analysis module; 1 - computer; 2 - step signal output control module; 3 - subtractor circuit; 4 - 0-10V comparison voltage (voltage source module); 5 - programmable amplifier (reverse proportional amplifier circuit); 6 - second NPN / PNP two-choice relay; 7 - voltage buffer circuit 1; 8 - voltage buffer circuit 2; 9 - first NPN / PNP two-choice relay; 10 - step voltage / current two-choice relay; 11 - transistor tracer collector terminal; 12 - transistor tracer base terminal; 13 - transistor tracer emitter terminal; 14 - sampling resistor switching module; 15 - differential circuit; 16 - ARM control chip; 17 - input end step voltage / current selection relay. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] The research objects and background of this manual are:

[0064] In view of the current development of semiconductor devices, the technical characteristics of semiconductor tube characteristic tracers have been greatly improved. The step signal range is as follows: ① Step current: 0.1μA / step ~ 10A / step, maximum allowable error: ±(3% ~ 5%); ② Step voltage: 0.01V / step ~ 10V / step, maximum allowable error: ±3%.

[0065] At present, the most widely used and typical graphic tracers in China are mainly produced by the following three companies:

[0066] Beijing Radio Instrument Factory produces the BJ4822 high-power intelligent tracer and the JT-1 transistor tracer. Shanghai Xinjian Instrument Equipment Co., Ltd. produces the XJ4838 digital storage 600A ultra-high-power semiconductor tube characteristic tracer, the XJ4832 100A high-power digital storage semiconductor tube characteristic tracer, and the XJ4810 / XJ4810A semiconductor tube characteristic tracers. Hangzhou Wuqiang Electronics Co., Ltd. produces the WQ4828A, WQ4829A, and WQ4830A digital storage tracers.

[0067] The models currently used more frequently abroad are the CS-3000 series semiconductor curve tracer produced by Iwasaki of Japan, the IST9010 / IST9020 high-power semiconductor device parameter test system produced by IST of the United States, and the 370A transistor tester produced by Tektronix of the United States.

[0068] The main models are the BJ4822 high-power intelligent graphing instrument produced by Beijing Radio Instrument Factory and the XJ4834 high-power digital storage semiconductor tube graphing instrument produced by Shanghai Xinjian Instrument Equipment Co., Ltd. The models currently used more frequently abroad are the 370B and 371A (not updated and no longer produced) from Tektronix in the United States and the CS-3000 from Iwasaki Corporation in Japan.

[0069] Reference Table 1 for comparison of the range of calibrated step signals for the step signal calibration circuit used in small and medium power semiconductor tube characteristic tracers.

[0070] Table 1

[0071]

[0072] As can be seen in Table 1, this embodiment primarily addresses the calibration of step current and step voltage for low- and medium-power tracers. Based on a familiarity with the internal structure of low- and medium-power tracers, a step signal calibration circuit for low- and medium-power semiconductor diode characteristic tracers was developed to meet the evolving needs of step signal calibration for low- and medium-power tracers.

[0073] In this specification and claims, the calibration principle is specifically as follows: When the NPN / PNP polarity selection matches the calibrated plotter, the step is set to 0, and the step calibration circuit matches the step amplitude level of the plotter, the computer controls the corresponding step calibration radio button to adjust the calibrated plotter to 10 levels / cluster and simultaneously adjusts its horizontal display mechanism. At this point, 11 light spots appear on the plotter screen, with the leftmost light spot being the 0th step. The plotter shift knob is adjusted to center the 0th step spot on the screen. The plotter's X deflection factor is then adjusted to 100mV / degree, leaving only the 0th step spot on the screen. The 0th step spot is then fine-tuned to the center of the screen. When the calibrator's step is set to 1st step, the computer controls the corresponding step calibration radio button. At this point, only the 1st step spot is located approximately at the center of the screen. If there is a discrepancy, the computer controls the 0-10V comparison voltage output to adjust the deviation and align the light spot position to the center of the screen. The error displayed is the percentage deviation for the 1st step of that level. Each time the computer controls and measures only one step, if the step is changed, the data must be saved first, otherwise the data will be lost. Generally, the 10th step can be measured. The step signal error is calculated as follows:

[0074]

[0075] Where: δ is the step signal error, N is the nominal value of the 10-level step signal, and N0 is the actual value of the 0-10V comparison voltage output.

[0076] Based on the above principles, this embodiment designs a step signal calibration system for calibrating small and medium-power semiconductor transistor characteristic tracers. Specifically, step signals of different amplitudes (V / step or A / step) are uniformly converted to a value of 1V / step through an internal proportional amplification or reduction circuit. The value is then subtracted from a standard 0-10V voltage signal through a subtractor circuit. The subtractor circuit outputs the subtracted voltage signal and returns it to the C and E terminals of the transistor tracer. Only the calibrated step signal point is displayed on the tracer screen. The host computer software compares and calculates the value with the reference step signal to obtain the tracer step signal error. For specific implementation instructions, please refer to Examples 1-4.

[0077] Example 1:

[0078] like Figure 1-Figure 3 As shown, this embodiment provides a step signal calibration system for a small and medium-power semiconductor tube characteristic tracer, the system including a step signal preprocessing module, a step signal conversion module and a control and error analysis module: the step signal preprocessing module is used to preprocess the input step signal to distinguish the type of the step signal and determine the polarity of the step signal; the step signal conversion module is used to perform uniform processing and signal subtraction on the preprocessed step signal to obtain a step signal error; the control and error analysis module is used to perform step signal calibration on the tracer based on the step signal error.

[0079] Preferably, in the step signal preprocessing module, the input-end step voltage / current selection relay, the step voltage / current two-choice relay, the first NPN / PNP two-choice relay, the voltage buffer module and the second NPN / PNP two-choice relay are connected in sequence; the sampling resistor switching module and the differential circuit form a loop; the control chip is connected to the control and error analysis module; the sampling resistor switching module is connected to the input-end step voltage / current selection relay; the differential circuit is connected to the step voltage / current two-choice relay; the control chip is connected to the input-end step voltage / current selection relay, the first NPN / PNP two-choice relay and the second NPN / PNP two-choice relay.

[0080] Among them, the step signal first enters the step signal preprocessing module (module 1), which mainly distinguishes the step signal type and selects the step signal polarity. The step signal enters the circuit through the base terminal (12) and the emitter terminal (13). It is then judged by the input end step voltage / current selection relay (17). If it is a step voltage signal, it directly enters the step voltage / current two-select relay (step voltage / current selection) (10), and then further judges the polarity through the first NPN / PNP two-select relay (NPN / PNP selection) (9). If it is NPN polarity, the signal enters the voltage buffer circuit 1 (7), and if it is PNP polarity, the signal enters the voltage buffer circuit 2 (8), and then transmits the signal to the next module for processing through the second NPN / PNP two-select relay (NPN / PNP selection) (6). If it is a step current signal, the signal will first enter the sampling resistor switch (14) to select a suitable sampling resistor to convert the step current signal into a step voltage signal, and then the converted step voltage signal is collected by the differential circuit (15) and transmitted to the following circuit for processing. The processing method is the same as that of the step voltage signal.

[0081] Preferably, the step signal conversion module includes a step signal output control module, a subtractor circuit, a voltage source module and a reverse proportional amplification circuit; the step signal output control module, the subtractor circuit and the voltage source module are connected in sequence, the subtractor circuit is connected to the reverse proportional amplification circuit; the reverse proportional amplification circuit is connected to the second NPN / PNP two-selection relay; the control chip is connected to the voltage source module and the reverse proportional amplification circuit.

[0082] Among them, the pre-processed step signal is transmitted to the step signal conversion module (module 2). This module mainly performs unified processing and signal subtraction on the step signal. The signal first enters the reverse proportional amplifier circuit (5), and the different feedback resistors of the reverse proportional amplifier circuit are switched by control signal 1, and the step signals of different amplitudes are converted into 1V / step step signals through this circuit. Then the signal is transmitted to the subtractor circuit (3), and the processed step signal is subtracted from the standard 0-10V voltage signal (4). Finally, the subtracted signal is transmitted to the step signal output control module (2), and fed back to the collector terminal (11) and the emitter terminal (13) for display.

[0083] In this embodiment, all signal control and data processing are implemented by the control and error analysis module (module 3). The computer (1) sends instructions to the ARM chip (16) through the LAN communication module, thereby controlling the step signal output control module (2), the 0-10V comparison voltage (4), the reverse proportional amplifier circuit (5), the two-choice relay (NPN / PNP selection) (6, 9), the two-choice relay (step voltage / current selection) (10), and the input end step voltage / current selection relay (17). The computer (1) sends control instructions to switch gears, calibrate the step signal error in sequence, and then record the test results in the background database. Finally, the measurement error is automatically calculated and a test report is generated. The form of the step current report and the step voltage report can be referred to.

[0084] Step Current Report

[0085]

[0086]

[0087]

[0088] Step Voltage Report

[0089]

[0090]

[0091] This embodiment also provides a small- to medium-power semiconductor diode characteristic tracer calibrator, including the above-mentioned step signal calibration system.

[0092] like Figure 4 As shown, this embodiment also provides a step signal calibration method for a small and medium power semiconductor diode characteristic tracer, the method comprising the following steps:

[0093] S401 : Preprocessing an input step signal according to a step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal.

[0094] This step includes:

[0095] S4011. Selecting a relay to distinguish the type of the step signal according to the input-end step voltage / current.

[0096] S4012: Select a corresponding preprocessing subcircuit according to the type of the step signal to determine the polarity of the step signal.

[0097] This step includes:

[0098] S40121. If the step signal type is a step voltage signal type, the step signal is processed by a step voltage / current two-selection relay and then introduced into a first NPN / PNP two-selection relay for primary polarity judgment; the step signal after the primary polarity judgment is processed by a corresponding voltage buffer circuit and then introduced into a second NPN / PNP two-selection relay for secondary polarity judgment.

[0099] S40122. If the step signal type is a step current signal type, the step signal is processed by the sampling resistor switching module and the differential circuit and then introduced into the above-mentioned step voltage / current two-selection relay and subsequent operations are performed (the operation method is consistent with the step voltage signal).

[0100] S402 , performing unified processing and signal subtraction on the pre-processed step signal according to the step signal conversion module to obtain a step signal error.

[0101] This step includes:

[0102] S4021. The step signal after the secondary polarity determination is introduced into a reverse proportional amplifier circuit including an adjustable feedback resistor to convert the step signals of different amplitudes into a step signal of 1V / step.

[0103] S4022. Subtract the converted step signal from the standard 0-10V voltage signal according to the subtractor circuit to obtain a step signal error.

[0104] S403 , performing step signal calibration on the tracer according to the step signal error.

[0105] Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be completed by instructing related hardware through a program, and the corresponding program may be stored in a computer-readable storage medium.

[0106] It should be noted that although the method operations of the above embodiments are described in a particular order in the accompanying drawings, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations must be performed to achieve the desired results. Rather, the depicted steps may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into a single step, and / or a single step may be broken down into multiple steps.

[0107] Example 2:

[0108] like Figure 5 As shown, this embodiment provides a step signal calibration device for a small and medium power semiconductor diode characteristic tracer. The device includes a pre-processing module 501, a first calculation module 502, and a second calculation module 503. The specific functions of each module are as follows:

[0109] A preprocessing module 501 is configured to preprocess the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal;

[0110] A first calculation module 502 is configured to perform unified processing and signal subtraction on the pre-processed step signal according to the step signal conversion module to obtain a step signal error;

[0111] The second calculation module 503 is configured to perform step signal calibration on the tracer according to the step signal error.

[0112] Example 3:

[0113] like Figure 6 As shown, this embodiment provides a computer device, which includes a processor 602, a memory, an input device 603, a display device 604, and a network interface 605 connected via a system bus 601. The processor 602 is used to provide computing and control capabilities, and the memory includes a non-volatile storage medium 606 and an internal memory 607. The non-volatile storage medium 606 stores an operating system, a computer program, and a database. The internal memory 607 provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium 606. When the computer program is executed by the processor 602, the step signal calibration method of the above-mentioned embodiment 1 is implemented as follows:

[0114] preprocessing the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal;

[0115] The pre-processed step signal is uniformly processed and signal subtracted according to the step signal conversion module to obtain the step signal error;

[0116] The step signal calibration is performed on the tracer according to the step signal error.

[0117] Example 4:

[0118] This embodiment provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the step signal calibration method of the above embodiment 1 is implemented as follows:

[0119] preprocessing the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal;

[0120] The pre-processed step signal is uniformly processed and signal subtracted according to the step signal conversion module to obtain the step signal error;

[0121] The step signal calibration is performed on the tracer according to the step signal error.

[0122] It should be noted that the computer-readable storage medium of the present embodiment may be a computer-readable signal medium or a computer-readable storage medium or any combination thereof. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0123] In this embodiment, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. Furthermore, in this embodiment, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable storage medium other than a computer-readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device. The computer program contained on a computer-readable storage medium may be transmitted using any suitable medium, including but not limited to wires, optical cables, RF (radio frequency), etc., or any suitable combination thereof.

[0124] The computer readable storage medium can be written in one or more programming languages ​​or a combination thereof to execute the computer program for performing the present embodiment, including object-oriented programming languages ​​such as Java, Python, C++, and conventional procedural programming languages ​​such as C or similar programming languages. The program can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect via the Internet).

[0125] In summary, the present invention is different from the step signal acquisition and calibration method. Instead, the step signal output by the tracer is uniformly preprocessed and then returned to the tracer for display, thereby ultimately achieving step signal calibration. The circuit structure is simple and can achieve step signal calibration for general-purpose and small and medium-power semiconductor tube characteristic tracers, meeting the needs of the development of step signal calibration for small and medium-power semiconductor tube characteristic tracers.

[0126] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the scope disclosed by the present invention, which falls within the scope of protection of the present invention.

Claims

1. A step signal calibration method, characterized in that: For use in a small and medium power semiconductor tube characteristic tracer, the method comprises: preprocessing the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal; The pre-processed step signal is uniformly processed and signal subtracted according to the step signal conversion module to obtain the step signal error; The step signal calibration is performed on the tracer according to the step signal error.

2. The method according to claim 1, characterized in that The step signal preprocessing module preprocesses the input step signal to distinguish the step signal type and determine the step signal polarity, including: The relay is selected to distinguish the type of the step signal according to the step voltage / current of the input terminal; A corresponding preprocessing subcircuit is selected according to the type of the step signal to determine the polarity of the step signal.

3. The method according to claim 2, characterized in that The selecting a corresponding pre-processing sub-circuit according to the type of the step signal to determine the polarity of the step signal includes: If the step signal type is a step voltage signal type, the step signal is processed by the step voltage / current two-selection relay and then introduced into the first NPN / PNP two-selection relay for primary polarity judgment; the step signal after the primary polarity judgment is processed by the corresponding voltage buffer circuit and then introduced into the second NPN / PNP two-selection relay for secondary polarity judgment; If the step signal type is a step current signal type, the step signal is processed by the sampling resistor switching module and the differential circuit and then introduced into the above-mentioned step voltage / current two-choice relay to perform subsequent operations.

4. The method according to claim 3, characterized in that The step signal conversion module uniformly processes and subtracts the pre-processed step signal to obtain a step signal error, including: The step signal after the secondary polarity determination is introduced into a reverse proportional amplifier circuit including an adjustable feedback resistor to convert the step signals of different amplitudes into a step signal of 1V / step; The converted step signal is subtracted from the standard 0-10V voltage signal according to the subtractor circuit to obtain the step signal error.

5. A step signal calibration device, characterized in that: Used for a small and medium power semiconductor tube characteristic tracer, the device comprises: a preprocessing module, configured to preprocess the input step signal according to the step signal preprocessing module to distinguish the type of the step signal and determine the polarity of the step signal; A first calculation module is used to perform unified processing and signal subtraction on the pre-processed step signal according to the step signal conversion module to obtain a step signal error; The second calculation module is used to perform step signal calibration on the tracer according to the step signal error.

6. A step signal calibration system, characterized in that: For small and medium power semiconductor tube characteristic tracer, the system includes a step signal preprocessing module, a step signal conversion module and a control and error analysis module: The step signal preprocessing module is used to preprocess the input step signal to distinguish the type of the step signal and determine the polarity of the step signal; The step signal conversion module is used to perform unified processing and signal subtraction on the pre-processed step signal to obtain a step signal error; The control and error analysis module is used to perform step signal calibration on the tracer according to the step signal error.

7. The system according to claim 6, characterized in that In the step signal preprocessing module, the input end step voltage / current selection relay, the step voltage / current two-choice relay, the first NPN / PNP two-choice relay, the voltage buffer module and the second NPN / PNP two-choice relay are connected in sequence; the sampling resistor switching module and the differential circuit form a loop; the control chip is connected to the control and error analysis module; The sampling resistor switching module is connected to the input end step voltage / current selection relay; The differential circuit is connected to a step voltage / current two-choice relay; The control chip is connected to the input-end step voltage / current selection relay, the first NPN / PNP two-to-one relay, and the second NPN / PNP two-to-one relay.

8. The system according to claim 7, characterized in that: The step signal conversion module includes a step signal output control module, a subtractor circuit, a voltage source module and a reverse proportional amplification circuit; The step signal output control module, the subtractor circuit, and the voltage source module are connected in sequence, and the subtractor circuit is connected to the reverse proportional amplification circuit; The reverse proportional amplification circuit is connected to a second NPN / PNP two-choice relay; The control chip is connected to the voltage source module and the reverse proportional amplification circuit.

9. Small and medium power semiconductor tube characteristic tracer calibrator, characterized by: The invention comprises the system according to any one of claims 6 to 8.

10. A storage medium storing a program, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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