Programmable function unit with programmable fast ripple logic
US5386156A · kind A · utility
58Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Aug 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17728
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable function unit (PFU) well adapted for use in a field programmable gate array (FPGA) is disclosed. The PFU utilizes programmable fast ripple logic. A programmable generator and/or a programmable propagator are implemented in look up tables in each PFU block. A multiplexer under control of the propagator determines whether to transmit the carry in from the previous block or to transmit the generator signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.