Sequential logic circuit device

Details Sequential logic circuit device Sequential logic circuit device

1991-03-07

1992-08-18

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307291, H03K 3284, H03K 329

Patent

active

051401762

ABSTRACT:
A logic circuit part, which is composed of a flip-flop group and a combinational circuit and performs a sequential logic operation, is added with a specify circuit for selectively specifying desired flip-flop circuits in the flip-flop group and a write circuit for applying a set or reset signal to the flip-flop circuits selectively specified by the specify circuit. Each flip-flop circuit includes: a flip-flop for writing input data in response to a system clock; a first AND gate which, when the flip-flop circuit is selectively specified by the specify circuit, passes therethrough the set signal to set the flip-flop; a second AND gate which, when the flip-flop circuit is selectively specified by the specify circuit, passes therethrough the reset signal to reset the flip-flop; and a third and gate which, when the flip-flop circuit is selectively specified by the specify circuit, passes therethrough the output logic of the flip-flop to the outside.

REFERENCES:
patent: 4424581 (1984-01-01), Kawai
patent: 4540903 (1985-09-01), Cooke et al.
patent: 4580066 (1986-04-01), Berndt
patent: 4970417 (1990-11-01), Kubota
patent: 5003204 (1991-03-01), Cushing et al.

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