Adder/substractor for variable length numbers

Details Adder/substractor for variable length numbers Adder/substractor for variable length numbers

1985-03-04

1987-11-17

Harkcom, Gary V.

Boots, shoes, and leggings

364749, 364786, G05F 750, G06F 738

Patent

active

047078006

ABSTRACT:
An adder/subtractor wherein N/2 two bit adders are connected to allow the addition of numbers having N bits, each one of the two bit adders having associated control circuitry adapted: (a) to cause each two bit adder either to add applied bits directly or to add one applied bit and the "two's complement" of the other bit; and (b) to electrically separate any selected ones of the two bit adders from the others.

REFERENCES:
patent: 3100835 (1960-01-01), Bedrij
patent: 3676657 (1972-07-01), De Boer
patent: 3767906 (1973-10-01), Pryor
patent: 3993891 (1976-10-01), Beck et al.
patent: 4052604 (1977-10-01), Maitland et al.
patent: 4439835 (1984-03-01), Best et al.
patent: 4523292 (1985-06-01), Armer
patent: 4536855 (1985-08-01), Morton
patent: 4573137 (1986-02-01), Ohhashi

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