Browse Prior Art Database

Exclusive Or Circuit

IP.com Disclosure Number: IPCOM000095168D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Kuck, A: AUTHOR [+2]

Abstract

An Exclusive-Or function can be performed by a four-diode bridge with a passive load.

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Exclusive Or Circuit

An Exclusive-Or function can be performed by a four-diode bridge with a passive load.

If there is an input at A of the indicated polarity and an input of zero potential at B, diodes 10 and 12 are forward biased. Current flows through them and load RL from terminal 14 to terminal 16. In like manner, if there is an input at B of the indicated polarity and an input at A of zero potential, diodes 18 and 20 are forward biased. Current flows through them and RL from terminal 16 to terminal
14. However, if the inputs at A and B are both at zero potential, or if the inputs at A and B are of substantially the same magnitude with the indicated polarities, none of the diodes are forward biased. Current does not now through RL.

Load RL is shown as a resistor. However, other loads can be used. The load need not perform any logical function to obtain the Exclusive-Or operation.

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