CMOS high voltage drive output buffer

Details CMOS high voltage drive output buffer CMOS high voltage drive output buffer

1998-04-28

2000-01-11

Tokar, Michael

Electronic digital logic circuitry

Interface

Current driving

H03K 190948, H03K 190185

Patent

active

060140399

ABSTRACT:
A CMOS high voltage drive output buffer that protects the drive stage from seeing relatively high voltages (e.g., 5 V) during "hot pluggable" conditions (that is, when the reference voltage VDD is not present). A transmission gate and clamping transistors are disposed around the output devices to provide the requisite protection. A backgate bias generator for use with P-channel devices is also disclosed that is capable of withstanding "hot pluggable" conditions.

REFERENCES:
patent: 5414314 (1995-05-01), Thurber, Jr.
patent: 5418476 (1995-05-01), Strauss
patent: 5684415 (1997-11-01), McManus
patent: 5736869 (1998-04-01), Wei
patent: 5808480 (1998-09-01), Morris

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