Sine/cosine generator and method
US5276633A · kind A · utility
72Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Aug 14, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2101/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A sine/cosine generator with coarse and fine angles having compressed sine and cosine read only memories (ROMS) by use of symmetry of coarse angles about .pi./4 and, optionally, symmetry of fine angles about 0. The output of the ROMs directly feed multiplexers for utilization of the compressed storage. Addressing of complementary coarse angles is with one's complementing of the address and of complementary fine angles is with two's commplementing of the address. Fine sines and cosines are stored in recoded version for direct use in multipliers for computations using the sum of angles formulas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.