ESD protection circuit

Details ESD protection circuit ESD protection circuit

1998-06-18

2000-03-28

Jackson, Stephen W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361 56, 361 58, 361 911, H02H 900

Patent

active

060439688

ABSTRACT:
An inverter is connected between an external GND terminal and a drain of an internal circuit such that the drain of the internal circuit is not directly connected to the external GND terminal. As a result, even when the input of a transfer gate of the internal circuit is to be at a GND level, it is possible to prevent any current flowing to VDD from the drain of a p-type transistor through a well and to prevent electrons from flowing into an external power supply potential VDD terminal from the drain of an n-type transistor. Thus, the internal circuit can be protected from ESD even when static electricity is applied to an external power supply terminal or GND terminal.

REFERENCES:
patent: 5319252 (1994-06-01), Pierce et al.
patent: 5543734 (1996-08-01), Volk et al.
patent: 5576654 (1996-11-01), Shu et al.

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