Multi-bit exclusive or

Details Multi-bit exclusive or Multi-bit exclusive or

1997-07-15

1999-10-12

Lam, Tuan T.

Electronic digital logic circuitry

Exclusive function

326 53, H03K 1921

Patent

active

059660295

ABSTRACT:
The present invention relates to multi-bit exclusive-or (XOR) gates (60), including those where N parallel input bits (36, 38) are XORed with one data input bit (52). A modular approach is made using only one basic cell (30) for various implementations with different propagation delays. An N-bit XOR comprises basic cells (30) of adjacent first and second XOR gates (32, 34). Each first XOR gate (32) processes as input two of said N primary input bits (36, 38) and each second XOR gate (34) processes as input bits output bits of first or second XOR gates (32, 34) or the input data bit (52). This structure makes it possible to create an array of identical basic cells which is very suitable for VLSI implementation. There are few lines of connections between the different cells in the cell array which leads to substantial reduction in propagation delay without adding substantial wiring or layout complexity.

REFERENCES:
patent: 4251884 (1981-02-01), Baun, Jr.
patent: 4958353 (1990-09-01), Greiner et al.
patent: 5191243 (1993-03-01), Shen et al.
patent: 5247525 (1993-09-01), Taira et al.
patent: 5523707 (1996-06-01), Levy et al.

Affiliated with

Also associated with

Rating

Multi-bit exclusive or does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-bit exclusive or, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-bit exclusive or will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-656142