Optical arithmetic logic using the modified signed-digit redundant number representation
US4863247A · kind A · utility
11Cited by
1References
10Claims
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Key dates
| Filing date | Jun 16, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jun 16, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06E1/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Optical architectures are presented for performing fully parallel, carry-free computation with a trinary, modified signed-digit number representation to allow addition, subtraction and multiplication. Two different optical schemes involving position and polarization encoding enable the fabrication of modular trinary logic systems that accommodate trinary numbers of different magnitudes. The optical systems made up of redundant three-dimensional modules provide a designer with latitude to simultaneously carry out addition, subtraction or multiplication optically and with reduced complexity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.