Circuitry for providing overvoltage backdrive protection

Details Circuitry for providing overvoltage backdrive protection Circuitry for providing overvoltage backdrive protection

2005-06-14

2005-06-14

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S080000, C326S068000

Reexamination Certificate

active

06906553

ABSTRACT:
A logic gate for use in an electronic system comprising: i) a first component operating from a low voltage power supply rail; ii) a second component operating from a high voltage power supply rail; and iii) an over-voltage protection circuit that detects an over-voltage on an output pad of the first component and, in response to the detection generates from the over-voltage a generated power supply voltage and a generated reference signal. According to an advantageous embodiment of the present invention, the logic gate comprises a plurality of transistors, wherein the plurality of transistors are powered by the generated power supply voltage and at least one of the plurality of transistors is turned ON and OFF by the generated reference signal.

REFERENCES:
patent: 5929667 (1999-07-01), Abadeer et al.
patent: 6081412 (2000-06-01), Duncan et al.
patent: 6323704 (2001-11-01), Pelley et al.
patent: 6437958 (2002-08-01), Duncan et al.

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