Arithmetic cell for field programmable devices
US5805477A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/3884
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An arithmetic cell to be used in field programmable devices is defined in this invention. This cell will allow efficient implementations of multipliers, multipliers/accumulators and adders (addition, compare, and subtraction) in one compact cell that is a collection of circuits common to field programmable devices. This cell may be used in a flexible manner that allows full multipliers of any dimension (n*m products), adders of any length (n+m sums, compare, differences), accumulators, and registers (to hold complete results or partial products). Key elements in this invention are an application controlled multiplexer, signal routing to provide a shift function for multiplication, and a minimum collection of configuration bits and circuit elements to perform the basic arithmetic functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.