Browse Prior Art Database

CMOS Four Way XOR Circuit

IP.com Disclosure Number: IPCOM000045784D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Griffin, WR: AUTHOR [+2]

Abstract

This circuit, which does not dissipate direct current power, combines the exclusive-OR (XOR) function of four inputs into one functional logic block by using complementary metal oxide semiconductor (CMOS) technology.

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CMOS Four Way XOR Circuit

This circuit, which does not dissipate direct current power, combines the exclusive-OR (XOR) function of four inputs into one functional logic block by using complementary metal oxide semiconductor (CMOS) technology.

The Boolean expression for the circuit illustrated in the figure is: See Original.

P channel devices or transistors are indicated by the letter P, and N channel devices are indicated by the letter N.

lf the control gates X(1), X(2), X(3) and X(4) have a high voltage applied thereto, with the control gates X(1), X(2), X(3) and X(4) having low voltages, the output will be high since VH is connected to the output through conducting transistors 10, 12, 14 and 16, while non-conducting transistors 18, 20, 22 and 24 isolate the output from ground. In a similar manner the voltage is high for each of the other terms of the Boolean expression. For any other combination of inputs to the control gates the output voltage is low.

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