Voltage triggering static discharge clamping circuit with feedback strengthening effect

Abstract

The invention discloses a voltage triggering static discharge clamping circuit with a feedback strengthening effect. The static discharge clamping circuit mainly solves the problem of low discharge efficiency of a clamping device in the existing voltage triggering static discharge clamping circuit. The circuit comprises a triggering circuit, a feedback circuit and a clamping device. After the triggering circuit detects the static discharge, the bias voltage Vb is input into the feedback circuit, the feedback circuit inputs the feedback voltage Vf to the triggering circuit for realizing the short circuit effect on two diodes in the triggering circuit so that the current flowing in the triggering circuit is increased, the source grid voltage of a transistor in the feedback circuit is increased, the grid electrode driving voltage Vg of the clamping device is raised to high voltage, the clamping device is sufficiently turned on, and the static discharge charges are efficiently discharged. The voltage triggering static discharge clamping circuit has the advantages that the discharge efficiency of the clamping device in the voltage triggering static discharge clamping circuit is improved, and the voltage triggering static discharge clamping circuit can be used for the design of integrated circuits.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, relates to electrostatic discharge protection of integrated circuits, in particular to a voltage-triggered electrostatic discharge clamping circuit with feedback reinforcement, which can be used for electrostatic discharge protection of integrated circuits. Background technique [0002] During the manufacturing, packaging, transportation and use of integrated circuits, various forms of electrostatic discharge may occur. Electrostatic discharge is characterized by instantaneous large stress and is one of the main failure modes of integrated circuits. Electrostatic discharge cannot be completely avoided, so electrostatic discharge protection must be considered when designing and manufacturing integrated circuits. The intensity of electrostatic discharge can be equivalent to voltage. For example, in the human body model, the equivalent voltage of electrostatic discharge that can see ele...

AI Technical Summary

Problems solved by technology

That is to say, although the current discharged per unit area of ​​the clamping device is small, due to the increase in the size of the clamping device, the total current discharged by the clamping device will increase, thereby meeting certain protection requirements

Obviously this method increases the layout area and increases the manufacturing cost

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