Carry-chain compiler
US5493525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1995 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | May 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/507
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Carry-chain structures useful in circuits such as adders, subtractors, counters and arithmetic logic units (i.e., ALU's). The carry-chain structures have regular architectures that can be conveniently generated in various bit widths by automated compiler systems. In a preferred embodiment, a method for automatically generating a carry-chain circuit using a compiler which includes a library of cells by selecting a first cell from the library of cells for use as a carry propagation cell, and using the first cell for multiplexing a carry signal produced by the carry propagation cell, such that the carry-chain includes a plurality of first cells. Further, a carry-chain architecture is produced using the aforementioned method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.