ESD detection circuit and electronic system

Abstract

The invention discloses an ESD (electro-static discharge) detection circuit and an electronic system. The ESD detection circuit comprises an edge detection unit, an amplitude detection unit and a driving unit, wherein the input end of the edge detection unit is coupled to a power port directly or indirectly, a power-on voltage is connected into the power port, the edge detection unit is suitable for detecting amplitude variation of the power-on voltage per unit time directly or indirectly, and responding to the condition that the amplitude variation of the power-on voltage per unit time is greater than a preset variation threshold, the output end of the edge detection unit generates a first control signal; the amplitude detection unit is coupled to the power port and the output end of theedge detection unit respectively, the amplitude detection unit is suitable for detecting the power-on voltage, and responding to the conditions that the first control signal is received and the amplitude of the power-on voltage is greater than a preset amplitude threshold, the output end of the amplitude detection unit generates a break-over voltage; and the driving unit generates an ESD triggering current responding to the break-over voltage. By the adoption of the technical scheme, reliable detection of ESD can be realized, and a corresponding instruction signal can be generated.

Description

Technical field [0001] The invention relates to the field of electronic circuit design, in particular to an ESD detection circuit and an electronic system. Background technique [0002] ESD (Electro-Static discharge) means "electrostatic discharge". In an electronic system, the power supply state of an electrical device may have two types: a normal power supply state and an ESD power supply state. In the ESD power supply state, because the amount of static electricity coupled in the power-on voltage varies greatly per unit time, the electrical components in the electronic system may be damaged. Therefore, it is necessary to detect whether there is static electricity in the power supply voltage of the electrical components . [0003] In the prior art, an ESD detection circuit can be used to perform ESD detection on the power-on voltage connected to the power port. When it is detected that the power-on voltage is coupled with static electricity, a corresponding indicator signal suc...

AI Technical Summary

Problems solved by technology

[0004] However, the structure of the ESD detection circuit in the prior art is too simple, which makes the detection reliability insufficient, and needs to be improved urgently.

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