Circuitry for providing overvoltage backdrive protection

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

2006-10-17

2006-10-17

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S080000, C326S082000, C326S083000

Reexamination Certificate

active

07123053

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: 6222387 (2001-04-01), Meng et al.
patent: 6323704 (2001-11-01), Pelley et al.
patent: 6437958 (2002-08-01), Duncan et al.
patent: 6906553 (2005-06-01), Wert

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