Output circuit with overvoltage protection

Details Output circuit with overvoltage protection Output circuit with overvoltage protection

1996-10-15

1999-01-26

Santamauro, Jon

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 86, H03K 190175, H03K 190948

Patent

active

058642455

ABSTRACT:
An output circuit comprises a transfer gate connected between an input terminal of the output circuit and an input of an output buffer circuit, a protection circuit for turning off a transistor constituting the output buffer when a potential higher than an operating source voltage of the output buffer circuit is applied to an output of the output buffer circuit, and a control circuit for turning on the transfer gate in response to a signal input to the input terminal and to turn for turning off the transfer gate when the protection circuit is actuated.

REFERENCES:
patent: 5004936 (1991-04-01), Andresen
patent: 5406140 (1995-04-01), Wert et al.
patent: 5444397 (1995-08-01), Wong et al.
patent: 5661414 (1997-08-01), Shigehara et al.

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