ESD power supply clamping protection circuit with double-trigger structure

Abstract

The invention discloses an ESD power supply clamping protection circuit with a double-trigger structure. The ESD power supply clamping protection circuit comprises a transient trigger circuit, a static trigger circuit, a synthesis control circuit and a bleeder circuit. The transient trigger circuit identifies an ESD impact signal through an RC network. The static trigger circuit monitors a voltage signal through a diode string. The synthesis control circuit is used for controlling the on and off of the bleeder circuit. The ESD power supply clamping protection circuit provided by the invention can solve the problems that the existing ESD power supply clamping protection circuit is large in leakage current and easy to trigger mistakenly on the premise of providing reliable ESD protection performance.

Description

technical field [0001] The invention belongs to the technical field of microelectronics, and further relates to an electrostatic discharge ESD (Electronic Static Discharge) power supply clamp protection circuit with a double trigger structure in the technical field of integrated circuits. The invention can be used to be integrated in analog and radio frequency chips to protect the chips from ESD. Background technique [0002] The ESD power supply clamp protection circuit is the key module to realize the full-chip ESD protection of the integrated circuit. Its function is to provide a low-impedance current path when the ESD signal comes, so as to protect the internal circuit from the impact of high current. The traditional ESD power supply clamp protection circuit meets the function of chip ESD protection, but there are disadvantages such as large leakage current, easy false triggering, and large chip area. In order to achieve a better chip ESD protection effect, the ESD powe...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and propose a kind of ESD power supply clamp protection circuit with double trigger structure, which can solve the leakage of existing ESD power supply clamp protection circuit under the premise of providing reliable ESD protection performance The problem of high current and easy false triggering

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