Two-sum comparator

Details Two-sum comparator Two-sum comparator

1991-02-27

1992-09-01

Malzahn, David H.

Boots, shoes, and leggings

3401462, 364786, G06F 702, G06F 750

Patent

active

051445778

ABSTRACT:
A two-sum comparator. The two-sum comparator provides a comparison of two sums that is carried out by comparing their difference to zero. The formation of the difference of two sums that is essentially a four-addend addition is reduced to a two-addend addition according to a carry-save principle. The remaining two-addend addition is not carried out, but rather, one addend is directly compared to a negative of the other addend in a binary counter comparator.

REFERENCES:
patent: 3299261 (1967-01-01), Steigerwalt, Jr.
patent: 4683548 (1987-07-01), Mlynek
patent: 4761759 (1988-08-01), Nakagawa
patent: 4901270 (1990-02-01), Galbi et al.
"Halbleiter-Schaltungstechnik" by U. Tietze Ch. Schenk, 5th Edition, 1980, pp. 473-477.

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