ESD (Electro-Static Discharge) protection circuit

Abstract

The invention relates to a protection circuit and aims at providing a reliable and effective ESD (Electro-Static Discharge) protection circuit. In order to solve the technical problem, the technical scheme is that the ESD protection circuit comprises a power supply voltage input terminal, a grounding terminal and a diode, an anode of the diode is connected with the grounding terminal, a cathode of the diode is connected with the power supply voltage input terminal, the ESD protection circuit additionally comprises an IGBT (Insulated Gate Bipolar Transistor), a source of the IGBT is connected with the anode of the diode, a grid of the IGBT is connected with the grounding terminal and a drain of the insulated gate bipolar transistor is connected with the power supply input terminal. The ESD protection circuit has the advantages and beneficial effects that since the characteristics that the IGBT can bear large current and the starting after triggering is quick are fully utilized, the internal devices of an integrated circuit can be protected more reliably and effectively, the structure of the circuit is simple, the cost is low and the circuit is easy to realize. The ESD protection circuit is suitable for the integrated circuit, especially the power integrated circuit.

Description

technical field [0001] The invention relates to a protection circuit, in particular to an ESD protection circuit. Background technique [0002] With the continuous development of electronic technology, ESD (Electro-Static discharge, electrostatic discharge) has become an increasingly important issue in electronic systems. ESD can cause potential or permanent damage to the functionality, reliability, and quality of physical components in electronic systems. Therefore, the design and test verification technology of the ESD protection circuit has become an important topic in the design and development of integrated circuits. [0003] In specific circuit design and application, developers usually need to design different types and structures of ESD protection circuits according to actual conditions to meet actual application requirements and ESD test standards. At present, the devices used for ESD protection mainly include varistors, polymers, inductors, capacitors, transient ...

AI Technical Summary

Problems solved by technology

GTR saturation voltage drops, high current density, but large drive current; MOSFET drive power is small, fast switching speed, but large conduction voltage drop, low current density

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