Barrel shifter
US4827441A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F5/015
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A barrel shifter comprises a first plurality of bit lines, a second plurality of bit lines and a plurality of switchable interconnections therebetween. A first subset of the switchable interconnections provide each of a set of desired shifts, while a second subset of the switchable interconnections duplicate certain of the first subset thereof and shorten the worst-case path lengths through the shifter. The first and second pluralities of bit lines may comprise interleaved high- and low-order bit lines of two data buses. Interface means may provide the interleaving function and also may provide means for accomplishing at least one shift in addition to the set of desired shifts. Sense amplifiers may be included for sensing voltage transitions on each bit line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.