ESD protection for overvoltage friendly input/output circuits

Details ESD protection for overvoltage friendly input/output circuits ESD protection for overvoltage friendly input/output circuits

1996-10-24

1998-01-13

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, H02H 900

Patent

active

057085501

ABSTRACT:
An electrostatic discharge (ESD) protection circuit includes an input terminal, a power supply line and a source of reference potential. The circuit also includes a dummy supply line. A Schottky barrier diode is connected between the input terminal and the power supply line for blocking voltages from the input terminal which are greater than the power supply voltage. A first clamping structure is connected between the dummy supply line and the source of reference potential, and a second clamping structure is connected between the power supply line and the source of reference potential. A first clamping diode is connected between the input terminal and the dummy supply line and a second clamping diode is connected between the input terminal and the source of reference potential.

REFERENCES:
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patent: 5514612 (1996-05-01), Rao et al.
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patent: 5600525 (1997-02-01), Avery
patent: 5633773 (1997-05-01), Suur-Askola
Copy of International Search Report dated Feb. 21, 1997, from corresponding international application.

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