Electrostatic protection circuit

Details Electrostatic protection circuit Electrostatic protection circuit

2005-09-27

2009-08-04

Barnie, Rexford N (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S111000

Reexamination Certificate

active

07570467

ABSTRACT:
An electrostatic protection circuit being an integrated circuit on a semiconductor substrate and including a first power supply terminal having a predetermined potential VDD, a second power supply terminal having a lower potential VSS than the predetermined potential, and an input/output terminal for a signal, the electrostatic protection circuit including: a first and second diodes having the respective cathode electrodes thereof connected in series at a first common connection point between the first power supply terminal and input/output terminal; a third and fourth diodes having the respective anode electrodes thereof connected in series at a second common connection point between the second power supply terminal and input/output terminal; a first discharge element, connected between the first and second common connection points, for discharging excessive static electricity; and a second discharge element, connected between the first and second power supply terminals, for discharging excessive static electricity.

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patent: 6969891 (2005-11-01), Leroux
patent: 05-267589 (1993-10-01), None

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