Logic circuit utilizing pass transistors and logic gate

Details Logic circuit utilizing pass transistors and logic gate Logic circuit utilizing pass transistors and logic gate

1998-04-27

2000-07-04

Tokar, Michael

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Field-effect transistor

326113, 326121, 326 21, 326104, 326 87, 327408, H03K 19094, H03K 1920

Patent

active

06084437&

ABSTRACT:
A logic circuit combines a plurality of pass-transistor logic trees and a multiple-input logic gate for receiving intermediate logic signals from the respective pass-transistor logic trees, and can express a complex logical operation while decreasing the number of stages in pass-transistor logic trees and improving operation speed. Even a logical operation that cannot be expressed efficiently by a known or conventional pass-transistor logic circuit can be expressed efficiently with performance higher than that of a known CMOS logic circuit. Furthermore, when a static feedthrough current of the multiple-input logic gate is suppressed, power consumption can be reduced. In some embodiments, since circuitry for suppressing a static feedthrough current of the multiple-input logic gate is arranged so that a probability of occurrence of logical collision with a preceding stage will decrease or will be nil, power consumption can further be reduced.

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