Protecting one-hot logic against short-circuits during power-on

Details Protecting one-hot logic against short-circuits during power-on Protecting one-hot logic against short-circuits during power-on

2007-07-17

2007-07-17

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Field-effect transistor

C326S009000, C326S015000

Reexamination Certificate

active

10891771

ABSTRACT:
A method, a computer program, and an apparatus are provided to protect transmission gates in a multiplexer (mux). Because transmission gates are much faster than the more convention AND-OR arrays, transmission gate usage in muxes are being used more often in high speed circuitry. However, transmission gate have a significant problem in that short circuit are possible for situations where there is not a one-hot select signal. Therefore, to eliminate the problem, logic gates are utilized specifically during Power-On Reset (POR) to force a one-hot selection to prevent any possible short circuits.

REFERENCES:
patent: 6452423 (2002-09-01), Das et al.
patent: 6559677 (2003-05-01), Nitawaki

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