CN117269642A - Signal generation circuit for testing vehicle-standard-level transient immunity - Google Patents

Signal generation circuit for testing vehicle-standard-level transient immunity Download PDF

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Publication number
CN117269642A
CN117269642A CN202311123556.5A CN202311123556A CN117269642A CN 117269642 A CN117269642 A CN 117269642A CN 202311123556 A CN202311123556 A CN 202311123556A CN 117269642 A CN117269642 A CN 117269642A
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CN
China
Prior art keywords
pulse
voltage
circuit
capacitor
discharging
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CN202311123556.5A
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Chinese (zh)
Inventor
齐钊
陈泓全
魏敬奇
乔明
周锌
张波
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Chongqing Institute Of Microelectronics Industry Technology University Of Electronic Science And Technology
University of Electronic Science and Technology of China
Guangdong Electronic Information Engineering Research Institute of UESTC
Original Assignee
Chongqing Institute Of Microelectronics Industry Technology University Of Electronic Science And Technology
University of Electronic Science and Technology of China
Guangdong Electronic Information Engineering Research Institute of UESTC
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Application filed by Chongqing Institute Of Microelectronics Industry Technology University Of Electronic Science And Technology, University of Electronic Science and Technology of China, Guangdong Electronic Information Engineering Research Institute of UESTC filed Critical Chongqing Institute Of Microelectronics Industry Technology University Of Electronic Science And Technology
Priority to CN202311123556.5A priority Critical patent/CN117269642A/en
Publication of CN117269642A publication Critical patent/CN117269642A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/003—Environmental or reliability tests
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention provides a signal generating circuit for testing the transient immunity of a vehicle-standard, which realizes waveform 1 in a vehicle-standard surge test standard ISO7637 by a two-level discharge waveform superposition principle. According to ISO7637, when an inductive load such as a heating system of a power seat or seat in an automobile is disconnected from a power supply, since the inductive load in the circuit needs to maintain the original current, the voltage pulse generated by the inductive load will cause interference to the electronic components connected in parallel with the inductive load. The output waveform of the novel generating circuit provided by the invention simulates the waveform, and provides a novel source circuit for the work of chip design, protection device design and simulation, pulse test circuit design and the like.

Description

Signal generation circuit for testing vehicle-standard-level transient immunity
Technical Field
The invention belongs to the field of integrated circuit science and engineering, and particularly relates to a signal generating circuit for testing the vehicle-mounted transient immunity. In particular to a method for realizing a generating circuit for an ISO7637 waveform.
Background
With the development of modern automobile industry, a large number of vehicle-mounted electronic devices are widely applied to automobiles, such as vehicle-mounted satellite navigation systems, vehicle-mounted video entertainment systems, automobile body lighting systems, anti-theft systems, automatic air conditioning systems and the like. As the complexity of automobile control systems increases, the amount of data to be transmitted increases, and the number of electronic control units and electronic components in the vehicle increases. However, during the running process of the automobile, because the electromagnetic environment in the automobile and the external environment thereof are severe, the normal operation of the automobile can generate a great amount of electric transient and electromagnetic interference, and the electric transient and electromagnetic interference influence the operation of the automobile electronic equipment through modes of coupling, conduction, radiation and the like. Because of the special use of the automobile products, the running states of the electronic equipment are greatly related to the safe running of the automobile, and once the transient immunity of parts on the automobile cannot reach the corresponding protection level, the running safety of the automobile, the service life of the parts and the quality of the whole automobile cannot be ensured. Thus, property loss is caused, and even personal safety is endangered, so that the transient disturbance rejection standard of the automobile is extremely strict.
For this purpose, the international organization for standardization sets out ISO7637, which specifies a test method for transient electrical emissions in automotive electronics, and defines typical test pulses for evaluating the immunity of a device under test to transient events. According to ISO7637, when an inductive load such as a heating system of a power seat or seat in an automobile is disconnected from a power supply, since the inductive load in the circuit needs to maintain the original current, the voltage pulse generated by the inductive load will cause interference to the electronic components connected in parallel with the inductive load. As shown in fig. one, the above transient interference is characterized by: negative voltage pulse waveform, rise time of pulse is 1 (-0.5, +0) μs and 3 (-1.5, +0) μs for 12V and 24V vehicles, respectively; the fall time of the pulse is 2000 (+ -400) μs and 1000 (+ -200) μs, respectively; the initial falling speed of the pulse is faster, and the later falling speed is slower. However, the standard does not explicitly define the waveform generation circuit, which makes the simulation design process of the protection device difficult.
Disclosure of Invention
Aiming at the situation, the technical problems to be solved by the invention are as follows: a pulse generating circuit is provided for generating a voltage pulse waveform that highly coincides with a test standard, enabling accurate evaluation of stability and reliability of electronic components in automotive electronics.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a signal generating circuit for vehicle-level transient immunity testing, comprising: a first pulse-controlled periodic charging circuit 100, a second pulse-controlled periodic charging circuit 200, a first discharging circuit 300, and a second discharging circuit 400; wherein the first pulse-controlled periodic charging circuit 100, the second pulse-controlled periodic charging circuit 200, the first discharging circuit 300, and the second discharging circuit 400 are connected in parallel respectively;
the first pulse-controlled periodic charging circuit 100 is configured to periodically charge the first capacitor 07, so that the voltage across the first capacitor 07 reaches a preset voltage level, and periodically discharge the first capacitor through the first discharging circuit 300 to generate a first discharging current; a first end of the first pulse-controlled periodic charging circuit 100 is connected to a first end of the first discharging circuit 300, and a second end of the first pulse-controlled periodic charging circuit 100 and a second end of the first discharging circuit 300 are commonly grounded;
the second pulse-controlled periodic charging circuit 200 is configured to periodically charge the second capacitor 08, so that the voltages at two ends of the second capacitor 08 reach a preset voltage level, and periodically discharge through the second discharging circuit 400 to generate a second discharging current; the first end of the second pulse-controlled periodic charging circuit 200 is connected with the first end of the second discharging circuit 400, and the second end of the second pulse-controlled periodic charging circuit 200 and the second end of the second discharging circuit 400 are commonly grounded;
the first discharging circuit 300 is used for discharging a first current formed by discharging the first capacitor 07; the first end of the first discharging circuit 300 is connected with the first end of the first pulse-controlled periodic charging circuit 100, and the second end of the first discharging circuit 300 is commonly grounded with the second end of the first pulse-controlled periodic charging circuit 100;
the second discharging circuit 400 is used for discharging a second current formed by discharging the second capacitor 08; the first end of the second discharging circuit 400 is connected to the first end of the second pulse-controlled periodic charging circuit 200, and the second end of the second discharging circuit 400 is commonly grounded to the second end of the second pulse-controlled periodic charging circuit 200.
Preferably, the first pulse-controlled periodic charging circuit 100 includes a first dc voltage source 01, a first pulse voltage source 03, a first voltage-controlled switch 12, a first charging resistor 05, and a first capacitor 07; the first end of the first direct current voltage source 01 is connected with the first end of the first voltage-controlled switch 12, the second end of the first voltage-controlled switch 12 is connected with the first end of the first charging resistor 05, the second end of the first charging resistor 05 is connected with the first end of the first capacitor 07, the first end of the first pulse voltage source 03 is connected with the third end of the first voltage-controlled switch 12, and the second end of the first direct current voltage source 01, the second end of the first capacitor 07, the second end of the first pulse voltage source 03 and the fourth end of the first voltage-controlled switch 12 are grounded together.
Preferably, the second pulse-controlled periodic charging circuit 200 includes a second dc voltage source 02, a second pulse voltage source 04, a second voltage-controlled switch 13, a second charging resistor 06, and a second capacitor 08; the first end of the second direct current voltage source 02 is connected with the first end of the second voltage-controlled switch 13, the second end of the second voltage-controlled switch 13 is connected with the first end of the second charging resistor 06, the second end of the second charging resistor 06 is connected with the first end of the second capacitor 08, the first end of the second pulse voltage source 04 is connected with the third end of the second voltage-controlled switch 13, and the second end of the second direct current voltage source 02, the second end of the second capacitor 08, the second end of the second pulse voltage source 04 and the fourth end of the second voltage-controlled switch 13 are commonly grounded.
Preferably, the first discharging circuit 300 includes a first capacitor 07, a first voltage dividing resistor 09, and a third voltage dividing resistor 11; the first end of the first voltage dividing resistor 09 is connected with the first end of the first capacitor 07, the second end of the first voltage dividing resistor 09 is connected with the first end of the third voltage dividing resistor 11, and the second end of the first capacitor 07 and the second end of the third voltage dividing resistor 11 are commonly grounded.
Preferably, the second discharging circuit 400 includes a second capacitor 08, a second voltage dividing resistor 10, and a third voltage dividing resistor 11; the first end of the second voltage dividing resistor 10 is connected with the first end of the second capacitor 08, the second end of the second voltage dividing resistor 10 is connected with the first end of the third voltage dividing resistor 11, and the second end of the second capacitor 08 and the second end of the third voltage dividing resistor 11 are commonly grounded.
The working principle of the invention is as follows:
the first direct-current voltage source 01 charges the first capacitor 07 through the first charging resistor 05; the periodic pulse voltage generated by the first pulse voltage source 03 is used for controlling the periodic opening and closing of the first voltage-controlled switch 12 and is used for forming periodic excitation pulses;
after the first capacitor 07 charged by the first pulse-controlled periodic charging circuit 100 is disconnected from the first pulse-controlled periodic charging circuit 100, a first discharge current is generated through the first voltage dividing resistor 09 and the third voltage dividing resistor 11;
the second direct-current voltage source 02 charges the second capacitor 08 through the second charging resistor 06; the periodic pulse voltage generated by the second pulse voltage source 04 is used for controlling the periodic opening and closing of the second voltage-controlled switch 13 and is used for forming periodic excitation pulses;
after the second capacitor 08 charged by the second pulse-controlled periodic charging circuit 200 is disconnected from the second pulse-controlled periodic charging circuit 200, a second discharge current is generated through the second voltage dividing resistor 10 and the third voltage dividing resistor 11;
the first discharge current and the second discharge current flow together through the third voltage dividing resistor 11, and a test excitation waveform conforming to the description of ISO7637 is generated at the first end of the third voltage dividing resistor 11.
The beneficial effects of the invention are as follows: the method is used for generating excitation waveforms which are highly consistent with the test standard, and the stability and reliability of electronic components in the automobile electronics are more accurately evaluated.
Drawings
FIG. 1 is a schematic diagram of a pulse waveform defined by standard ISO 7637;
FIG. 2 is a schematic diagram of a pulse generating circuit according to the present invention;
FIG. 3 is a schematic diagram of a pulse generating circuit according to the present invention;
FIG. 4 is a voltage excitation waveform generated when an analog transient event occurs in a pulse generation circuit model embedded within a SPICE simulator, as provided by the present invention.
U A For supplying voltage, U s Is pulse peak voltage, t r For a voltage of from 0.1U s Up to 0.9U s Rise time, t d For a voltage of from 0.1U s Rising to the voltage peak and then falling to 0.1U s Pulse width t of (2) 1 T is the time interval between two pulses 2 Is U (U) A Vanishes to the next U A Time of recovery, t 3 Is U (U) A Vanishing to minimum time of pulse generation;
01 is a first direct current voltage source, 02 is a second direct current voltage source, 03 is a first pulse voltage source, 04 is a second pulse voltage source, 05 is a first charging resistor, 06 is a second charging resistor, 07 is a first capacitor, 08 is a second capacitor, 09 is a first voltage dividing resistor, 10 is a second voltage dividing resistor, 11 is a third voltage dividing resistor, 12 is a first voltage-controlled switch, and 13 is a second voltage-controlled switch; 100 is a first pulse controlled periodic charging circuit, 200 is a second pulse controlled periodic charging circuit, 300 is a first discharge circuit, 400 is a second discharge circuit.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
As shown in fig. 3, the present embodiment provides a signal generating circuit for vehicle-level transient immunity test, including:
a first pulse-controlled periodic charging circuit 100, a second pulse-controlled periodic charging circuit 200, a first discharging circuit 300, and a second discharging circuit 400; wherein the first pulse-controlled periodic charging circuit 100, the second pulse-controlled periodic charging circuit 200, the first discharging circuit 300, and the second discharging circuit 400 are connected in parallel respectively;
the first pulse-controlled periodic charging circuit 100 is configured to periodically charge the first capacitor 07, so that the voltage across the first capacitor 07 reaches a preset voltage level, and periodically discharge the first capacitor through the first discharging circuit 300 to generate a first discharging current; a first end of the first pulse-controlled periodic charging circuit 100 is connected to a first end of the first discharging circuit 300, and a second end of the first pulse-controlled periodic charging circuit 100 and a second end of the first discharging circuit 300 are commonly grounded;
the second pulse-controlled periodic charging circuit 200 is configured to periodically charge the second capacitor 08, so that the voltages at two ends of the second capacitor 08 reach a preset voltage level, and periodically discharge through the second discharging circuit 400 to generate a second discharging current; the first end of the second pulse-controlled periodic charging circuit 200 is connected with the first end of the second discharging circuit 400, and the second end of the second pulse-controlled periodic charging circuit 200 and the second end of the second discharging circuit 400 are commonly grounded;
the first discharging circuit 300 is used for discharging a first current formed by discharging the first capacitor 07; the first end of the first discharging circuit 300 is connected with the first end of the first pulse-controlled periodic charging circuit 100, and the second end of the first discharging circuit 300 is commonly grounded with the second end of the first pulse-controlled periodic charging circuit 100;
the second discharging circuit 400 is used for discharging a second current formed by discharging the second capacitor 08; the first end of the second discharging circuit 400 is connected to the first end of the second pulse-controlled periodic charging circuit 200, and the second end of the second discharging circuit 400 is commonly grounded to the second end of the second pulse-controlled periodic charging circuit 200.
The first pulse-controlled periodic charging circuit 100 includes a first direct current voltage source 01, a first pulse voltage source 03, a first voltage-controlled switch 12, a first charging resistor 05, and a first capacitor 07; the first end of the first direct current voltage source 01 is connected with the first end of the first voltage-controlled switch 12, the second end of the first voltage-controlled switch 12 is connected with the first end of the first charging resistor 05, the second end of the first charging resistor 05 is connected with the first end of the first capacitor 07, the first end of the first pulse voltage source 03 is connected with the third end of the first voltage-controlled switch 12, and the second end of the first direct current voltage source 01, the second end of the first capacitor 07, the second end of the first pulse voltage source 03 and the fourth end of the first voltage-controlled switch 12 are grounded together.
The second pulse-controlled periodic charging circuit 200 includes a second dc voltage source 02, a second pulse voltage source 04, a second voltage-controlled switch 13, a second charging resistor 06, and a second capacitor 08; the first end of the second direct current voltage source 02 is connected with the first end of the second voltage-controlled switch 13, the second end of the second voltage-controlled switch 13 is connected with the first end of the second charging resistor 06, the second end of the second charging resistor 06 is connected with the first end of the second capacitor 08, the first end of the second pulse voltage source 04 is connected with the third end of the second voltage-controlled switch 13, and the second end of the second direct current voltage source 02, the second end of the second capacitor 08, the second end of the second pulse voltage source 04 and the fourth end of the second voltage-controlled switch 13 are commonly grounded.
The first discharging circuit 300 includes a first capacitor 07, a first voltage dividing resistor 09, and a third voltage dividing resistor 11; the first end of the first voltage dividing resistor 09 is connected with the first end of the first capacitor 07, the second end of the first voltage dividing resistor 09 is connected with the first end of the third voltage dividing resistor 11, and the second end of the first capacitor 07 and the second end of the third voltage dividing resistor 11 are commonly grounded.
The second discharging circuit 400 includes a second capacitor 08, a second voltage dividing resistor 10, and a third voltage dividing resistor 11; the first end of the second voltage dividing resistor 10 is connected with the first end of the second capacitor 08, the second end of the second voltage dividing resistor 10 is connected with the first end of the third voltage dividing resistor 11, and the second end of the second capacitor 08 and the second end of the third voltage dividing resistor 11 are commonly grounded.
The working principle of this embodiment is as follows:
the first direct-current voltage source 01 charges the first capacitor 07 through the first charging resistor 05; the periodic pulse voltage generated by the first pulse voltage source 03 is used for controlling the periodic opening and closing of the first voltage-controlled switch 12, so as to form periodic pulses.
The first capacitor 07 charged by the first pulse-controlled periodic charging circuit 100 generates a first discharge current through the first voltage dividing resistor 09 and the third voltage dividing resistor 11 after the first pulse-controlled periodic charging circuit 100 is turned off.
The second direct-current voltage source 02 charges the second capacitor 08 through the second charging resistor 06; the periodic pulse voltage generated by the second pulse voltage source 04 is used for controlling the periodic opening and closing of the second voltage-controlled switch 13, and is used for forming periodic pulses.
The second capacitor 08 charged by the second pulse-controlled periodic charging circuit 200 generates a second discharge current through the second voltage dividing resistor 10 and the third voltage dividing resistor 11 after the second pulse-controlled periodic charging circuit 200 is turned off.
As can be seen from the above, the first discharge current and the second discharge current flow through the third voltage dividing resistor 11 together, and a test excitation waveform conforming to the description of ISO7637 is generated at the first end of the third voltage dividing resistor 11. As shown in fig. 4, is a waveform generated by the circuit. Comparing with the standard of ISO 7637-waveform 1 in FIG. 1, the main body of the invention is the periodic pulse part of the Y negative half-axis area, the work of the invention is to simulate the generation of the pulse waveform, and the waveform generated by the circuit of the invention accords with the standard waveform well through the superposition of the waveforms.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims of this invention, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the invention disclosed herein.

Claims (5)

1. A signal generating circuit for vehicle-level transient immunity testing, comprising: a first pulse-controlled periodic charging circuit (100), a second pulse-controlled periodic charging circuit (200), a first discharging circuit (300), and a second discharging circuit (400); wherein the first pulse-controlled periodic charging circuit (100), the second pulse-controlled periodic charging circuit (200), the first discharging circuit (300) and the second discharging circuit (400) are respectively connected in parallel;
the first pulse-controlled periodic charging circuit (100) is used for periodically charging the first capacitor (07) to enable the voltage at two ends of the first capacitor (07) to reach a preset voltage level, and periodically discharging through the first discharging circuit (300) to generate a first discharging current; the first end of the first pulse-controlled periodic charging circuit (100) is connected with the first end of the first discharging circuit (300), and the second end of the first pulse-controlled periodic charging circuit (100) is commonly grounded with the second end of the first discharging circuit (300);
the second pulse-controlled periodic charging circuit (200) is used for periodically charging the second capacitor (08) to enable the voltage at two ends of the second capacitor (08) to reach a preset voltage level, and periodically discharging through the second discharging circuit (400) to generate a second discharging current; the first end of the second pulse-controlled periodic charging circuit (200) is connected with the first end of the second discharging circuit (400), and the second end of the second pulse-controlled periodic charging circuit (200) is commonly grounded with the second end of the second discharging circuit (400);
the first discharging circuit (300) is used for discharging a first current formed by discharging the first capacitor (07); the first end of the first discharging circuit (300) is connected with the first end of the first pulse-controlled periodic charging circuit (100), and the second end of the first discharging circuit (300) is commonly grounded with the second end of the first pulse-controlled periodic charging circuit (100);
the second discharging circuit (400) is used for discharging a second current formed by discharging the second capacitor (08); the first end of the second discharging circuit (400) is connected with the first end of the second pulse-controlled periodic charging circuit (200), and the second end of the second discharging circuit (400) is grounded with the second pulse-controlled periodic charging circuit (200).
2. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the first pulse-controlled periodic charging circuit (100) comprises a first direct-current voltage source (01), a first pulse voltage source (03), a first voltage-controlled switch (12), a first charging resistor (05) and a first capacitor (07); the first end of a first direct current voltage source (01) is connected with the first end of a first voltage-controlled switch (12), the second end of the first voltage-controlled switch (12) is connected with the first end of a first charging resistor (05), the second end of the first charging resistor (05) is connected with the first end of a first capacitor (07), the first end of a first pulse voltage source (03) is connected with the third end of the first voltage-controlled switch (12), and the second end of the first direct current voltage source (01), the second end of the first capacitor (07), the second end of the first pulse voltage source (03) and the fourth end of the first voltage-controlled switch (12) are grounded together.
3. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the second pulse-controlled periodic charging circuit (200) comprises a second direct-current voltage source (02), a second pulse voltage source (04), a second voltage-controlled switch (13), a second charging resistor (06) and a second capacitor (08); the first end of the second direct current voltage source (02) is connected with the first end of the second voltage-controlled switch (13), the second end of the second voltage-controlled switch (13) is connected with the first end of the second charging resistor (06), the second end of the second charging resistor (06) is connected with the first end of the second capacitor (08), the first end of the second pulse voltage source (04) is connected with the third end of the second voltage-controlled switch (13), and the second end of the second direct current voltage source (02), the second end of the second capacitor (08), the second end of the second pulse voltage source (04) and the fourth end of the second voltage-controlled switch (13) are commonly grounded.
4. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the first discharging circuit (300) comprises a first capacitor (07), a first voltage dividing resistor (09) and a third voltage dividing resistor (11); the first end of the first voltage dividing resistor (09) is connected with the first end of the first capacitor (07), the second end of the first voltage dividing resistor (09) is connected with the first end of the third voltage dividing resistor (11), and the second end of the first capacitor (07) and the second end of the third voltage dividing resistor (11) are grounded together.
5. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the second discharging circuit (400) comprises a second capacitor (08), a second voltage dividing resistor (10) and a third voltage dividing resistor (11); the first end of the second voltage dividing resistor (10) is connected with the first end of the second capacitor (08), the second end of the second voltage dividing resistor (10) is connected with the first end of the third voltage dividing resistor (11), and the second end of the second capacitor (08) and the second end of the third voltage dividing resistor (11) are grounded together.
CN202311123556.5A 2023-09-01 2023-09-01 Signal generation circuit for testing vehicle-standard-level transient immunity Pending CN117269642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311123556.5A CN117269642A (en) 2023-09-01 2023-09-01 Signal generation circuit for testing vehicle-standard-level transient immunity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311123556.5A CN117269642A (en) 2023-09-01 2023-09-01 Signal generation circuit for testing vehicle-standard-level transient immunity

Publications (1)

Publication Number Publication Date
CN117269642A true CN117269642A (en) 2023-12-22

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Application Number Title Priority Date Filing Date
CN202311123556.5A Pending CN117269642A (en) 2023-09-01 2023-09-01 Signal generation circuit for testing vehicle-standard-level transient immunity

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