Power pulse applying circuit with adjustable pulse width and pulse adjusting method

Abstract

The invention discloses a pulse width adjustable power pulse applying circuit and a pulse adjusting method. The circuit comprises a diode D3, a resistor R1, a resistor RC, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor CC1, a capacitor CC2, a switch SW1, a switch SW2, a power supply VH and a switch and VH control and driving unit. The capacitor C1 is connected in parallel with the source; one end of the capacitor CC1 and one end of the capacitor CC2 are connected with the resistor RC, and the other ends of the capacitor CC1 and the capacitor CC2 are respectively connected with a bus DUT + and a bus DUT-; the power supply VH is connected with the capacitor C2 in parallel, the + end of the power supply VH is connected with the bus DUT + through the switch SW1 and the switch SW2 via the capacitor CC1, and the-end of the power supply VH is connected with the bus DUT-via the capacitor CC2; and the switch and VH control and drive unit is used for controlling the on-off and switch time sequence of the switches SW1 and SW2. By controlling the on-off and time sequence of the switch SW1 and the switch SW2, the pulse output of the required pulse width is realized, the technical problems that the pulse width adjustment is limited and the pulse edge shape is difficult to adjust in the prior art are solved, and particularly, the narrow pulse output can be realized.

Description

technical field [0001] The invention belongs to the technical field of testing electronic equipment, and in particular relates to a power pulse application circuit with adjustable pulse width and a pulse adjustment method. Background technique [0002] In the testing of electronic equipment, it is often necessary to apply pulses on the bus to check whether the electronic equipment can work reliably when the bus is disturbed. For example, EHV-16HV pulse and EHV-10Load-dump in "VW80300 Issue 2016-10 Electrical and Electronic High-Voltage Components in Motor Vehicles". In addition to acting on the device under test, the pulse applied on the bus will also act on the source. In order to reduce the interaction effect between the pulse and the source, the current common solution is to insert an inductor in series between the source device and the device under test. Applied to the device under test, the inductance isolates the interaction of the pulse and the source, such as figur...

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Problems solved by technology

[0004] In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a power pulse application circuit with adjustable pulse width and a pulse adjustment method. It solves the technical problems that the pulse width adjustment is limited and the pulse edge shape is not easy to adjust in the prior art

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