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Majority Vote CMOS Circuits

IP.com Disclosure Number: IPCOM000049676D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Hiltebeitel, JA: AUTHOR

Abstract

A logic building block in complementary metal oxide ) semiconductor (CMOS) technology is illustrated in the circuits of Figs. 1 and 2 as an inverse majority function which use a small number of devices and which do not require direct current power.

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Majority Vote CMOS Circuits

A logic building block in complementary metal oxide

) semiconductor (CMOS) technology is illustrated in the circuits of Figs. 1 and 2 as an inverse majority function which use a small number of devices and which do not require direct current power.

In the circuit of Fig. 1, a voltage source Indicated at terminal VH, having a voltage magnitude of preferably +5 volts, is connected through a serial path of paralleled transistor pairs 10 and 20, 12 and 22 and 14 and 24, all of the P channel type, to the output terminal 32. N channel type transistors 16 and 18, 26 and 28 and 30 and 32 provide parallel paths of serially arrayed transistors from the output terminal 34 to ground. Input terminal A is connected to the control electrodes of transistors 10, 12, 16 and 28; input terminal B is connected to the control electrodes of transistors 22, 24, 26 and 32; and input terminal C is connected to the control electrodes of transistors 14, 18, 20 and 30.

In the operation of the circuit of Fig. 1, when input voltages at terminals A and B are high, transistors 26 and 28 are turned on to provide a low voltage at output terminal 34, with transistors 10, 12, 22 and 24 being turned off. When inputs at terminals A and C are high, transistors 16 and 18 are turned on to provide a low voltage at output terminal 34, with transistors 10, 12, 14 and 20 being turned off. When inputs at terminals B and C are high, transistors 30 and 32 are turned on to provide a l...