Digital sine-cosine generator
US4551682A · kind A · utility
1Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1983 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Jan 3, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solid-state, digital logic, sine-cosine generator is provided for use in color television signal generators which contributes little or no phase shift or drift, whereby an input frequency of four times the color burst rate is used, and a first divide by two shift register operates upon that input signal frequency while a second divide by two shift register is used to obtain the proper color burst frequency as well as the 90.degree. relationship for the sine and cosine signals; a series of integrators then converts the digital "square" waves to triangular and then sinusoidal signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.