Method of demodulating multi-standard TV signals and a circuit device for implementing the method
US5095363A · kind A · utility
3Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1990 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Jul 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of demodulating multi-standard TV signals consists of providing a plurality of signals at a frequency which is a multiple of a reference frequency whose value is a common submultiple of the frequencies of the multi-standard signals. Thereafter, the signal to be demodulated is multiplied by one of said plural signals having a frequency which differs therefrom by a value equal to the reference frequency; by filtering the result of the multiplication, a signal is obtained at the reference frequency but corresponding in amplitude to the one to be demodulated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.