Television receiver with tuner capable of receiving air and CATV signals
US4002986A · kind A · utility
16Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Mar 27, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/244
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television receiver having a varactor diode tuned VHF tuner is operable with airborne and cable-connected signals. Bandswitch-controlled diodes change the values of inductive reactance in the tuner stages so the varactor diodes can tune to signals in the VHF Lo and Hi bands and CATV Mid and Super bands. Automatic bandswitching circuitry is included to enable reception of VHF channels 2-13 and UHF channels when operating in the air signal mode and VHF channels 2-13 and CATV Mid (A--I) and Super band (J--Z) channels when operating in the cable signal mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.