High speed greater than or equal to compare circuit
US5592142A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1995 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Sep 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The high speed greater than or equal to compare circuit comprises an equal to compare circuit having M number of exclusive-OR gates input into a NOR gate, each exclusive-OR gate N of the M number of exclusive-OR gates receiving as inputs a Nth bit of a first digital number having M bits and a corresponding Nth bit of a second digital number having M bits, wherein 1<N<M. Each exclusive-OR gate outputs a Nth not-equal signal indicating when the Nth bit of the first digital number is not equal to the corresponding Nth bit of the second digital number, whereby the output signal of the NOR gate indicates that the first digital number is equal to the second digital number. The circuit further comprises a greater than compare circuit including M number of NOR gates, each NOR gate N of the M NOR gates receives as inputs the complement of the Nth bit of the first digital number, a corresponding Nth bit of the second digital number, and each not-equal signal output from each exclusive-OR gate P, wherein N<P<M. The M NOR gates output a greater than signal indicating when the first digital number is greater than the second digital number. An output OR gate receives the NOR gate output signal f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.