Two-sum comparator
US5144577A · kind A · utility
11Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Feb 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/48
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.