Circuit for performing arithmetic operations

Details Circuit for performing arithmetic operations Circuit for performing arithmetic operations

1993-04-13

1995-02-28

Callahan, Timothy P.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Counter includes circuit for performing an arithmetic function

377 26, 377 28, 365205, 36518912, H03K 2140

Patent

active

053944500

ABSTRACT:
A race-free arithmetic operation circuit is disclosed. The circuit comprises a register file array, an arithmetic logic unit (ALU), and apparatus for controlling the input and/or the output signal of the ALU. The apparatus for controlling can be two level-sensitive latches, located before and after the ALU, or one master-slave flip-flop, located either before or after the ALU.

REFERENCES:
patent: 4293927 (1981-10-01), Hoshii
patent: 4473894 (1984-09-01), Yagihashi
patent: 5124589 (1992-06-01), Shiomi et al.
patent: 5229966 (1993-07-01), Ohsawa et al.
Programmable System Devices PSD: Design and Applications Handbook 1990, WSI, pp. 1-1.sub.13 1-2 and 4-39.sub.13 4-40, Waferscale Integration, Inc.

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