Integrated binary-BCD look-ahead adder

Details Integrated binary-BCD look-ahead adder Integrated binary-BCD look-ahead adder

1977-01-10

1978-10-03

Malzahn, David H.

Boots, shoes, and leggings

364787, G06F 750

Patent

active

041187865

ABSTRACT:
An improved system for adding two numbers together. The numbers may be expressed either in binary form or in binary coded decimal form (wherein each decimal digit is represented by its equivalent four binary bits). By taking advantage of "don't care" decimal input conditions, a minimal implementation of a carry look-ahead adder which can operate upon both types of numbers is obtained.

REFERENCES:
patent: 3596074 (1971-07-01), Mitrofanoff
patent: 3629565 (1971-12-01), Schmookler et al.
patent: 3711693 (1973-01-01), Dahl
patent: 3752394 (1973-08-01), Igel
patent: 3958112 (1976-05-01), Miller

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