Tuning system for a multi-band television receiver
US4418428A · kind A · utility
18Cited by
16References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1982 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Mar 30, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/246
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A television tuning system includes UHF and VHF signal paths each tuned by a tuning voltage and coupled to a common signal path by a diplexer. So that UHF signals will be attenuated so to not cause interferences with a VHF channel signal which is selected to be viewed, the UHF filter is detuned when a VHF channel is selected. Detuning the UHF filter is accomplished by modifying the tuning voltage for the UHF filter responsive to the VHF band-switching voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.