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CMOS Equivalent for Multiple-Party Bidirectional Signal Wire

IP.com Disclosure Number: IPCOM000058527D
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Engbersen, APJ Luijten, RP [+details]

Abstract

This article proposes a CMOS (Complementary Metal Oxide Semiconductor) technology implementation for a bidirectional wire interconnection of a plurality of circuits (connecting with an OR function the output of each of several circuits or parties to the input of each of these circuits). (Image Omitted) Fig.1 shows an ordinary open-collector implementation of an OR function interconnecting several parties. A single party is identified by the rounded rectangle. Each of the N parties is connected with the bidirectional wire A via an input line through a transistor and via an output line through a buffer (shown as triangle), e.g., a non-inverting Schmitt trigger. Any of the N parties can force the wire A to logic ZERO state, and any of the N parties can observe the logic state of the wire through its buffer.