Logic circuit

Details Logic circuit Logic circuit

1998-08-14

2000-05-16

Tokar, Michael

Electronic digital logic circuitry

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

Field-effect transistor

326106, 326108, 326121, H03K 19094

Patent

active

060642343

ABSTRACT:
A logic circuit for use as a selector having multiple inputs and high operation speed. The logic circuit includes a first FET having a first electrode connected to a first power supply, a second electrode connected to an output terminal and a third electrode connected to an intermediate control node, and a plurality of logic blocks parallelly connected between the second power supply and the output terminal. Each logic block includes second and third FETs being of a conductivity type opposite to that of the first FET and connected in series between the output terminal and a second power supply. Each logic block also includes a fourth FET being of the same conductivity type as the second and third FETs and having a third electrode connected to the third electrode of the second FET, a first electrode connected to the third electrode of the third FET and a second electrode connected to the intermediate control node. The conduction resistance between the output terminal and the first power supply is reduced and the parasitic capacitance added to the output terminal is also reduced, thereby allowing the logic circuit to be operated at high speed.

REFERENCES:
patent: 5291076 (1994-03-01), Bridges et al.
patent: 5661417 (1997-08-01), Kondoh

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