Frequency stabilized downconverter facilitating output frequency alteration
US4320533A · kind A · utility
4Cited by
5References
1Claims
0Family size
Inventor
Key dates
| Filing date | Sep 24, 1979 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Sep 24, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J7/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A downconverter having a voltage controlled local oscillator supplied with a control DC voltage, obtained from a frequency discriminator and responding to variations of the difference between a reference produced by a stable oscillator and an output signal frequency of the downconverter is employed for facilitating output channel alterations without changing local oscillator stability characteristics. When used as a television channel converter, it changes a channel in the UHF or SHF band to VHF channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.