Ultrafast current detection device and pulse test system

Abstract

The invention relates to the technical field of high-frequency current detection, and particularly relates to an ultrafast current detection device and a pulse test system. The ultrafast current detection device comprises an input, an output, a detection coaxial connector and an impedance matching circuit. The impedance matching circuit comprises three ends; a first end is connected with a pulse generating device through an input coaxial connector; a second end is connected with a tested device through an output coaxial connector via a transmission line; the second end is connected with a first acquisition end of a detection receiving device through the output coaxial connector via the transmission line; a third end is connected with the second acquisition end of the detection receiving device through the detection coaxial connector; and an input impedance of the impedance matching circuit, an output impedance of the impedance matching circuit, the output impedance of the pulse generating device, a first impedance of a first acquisition end of the detection receiving device and a second impedance of the second acquisition end of the detection receiving device are equal to a characteristic impedance of the pulse test system so that the pulse signals passing through the ultrafast current detection device can be accurately detected.

Description

technical field [0001] The invention relates to the technical field of high-frequency current detection, in particular to an ultrafast current detection device. Background technique [0002] The transmission line pulse generator (TLP) is used to measure the IV curve of the device during the process of withstanding electrostatic pulses, and provide the required simulation parameters for the global protection structure of electrostatic discharge (ESD) protection. Most ESD protection will use the transmission line pulse generator. [0003] The current detection system of the existing TLP system is often composed of an inductive current probe and an oscilloscope. Specifically, the TLP system has a transmission section transmission line. When performing current detection, the current probe is directly inserted into the core wire of the transmission line. The core wire of the transmission line passes through the current probe, and when the current flows through the probe, an induc...

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Problems solved by technology

However, the above operation needs to strip the transmission line and let the core wire of the transmission line pass through the current probe, which will cause the mismatch of the detection system and affect the detection of the current

Moreover, due to the bandwidth limitation of the current probe, it cannot accurately detect the current pulse whose rising edge is less than 200ps

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