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Bi-Cmos Xor3/Xor-Not3 Circuits With Pass Transistors

IP.com Disclosure Number: IPCOM000036034D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Boudon, G Wallart, F [+details]

Abstract

In Bi-CMOS technology, complex logic functions are built from basic traditionnal NAND and NOR Bi-CMOS circuits. To build an XOR 3 ways, widely used in full adders and multipliers, 7 Nand 2 ways are necessary. The proposed custom XOR/XOR-NOT 3 ways, based on pass transistors, are built with a reduced number of transistors and a reduced silicon area to perform the same logic function (Figs. 1 and 2).