Television signal selection device
US4819069A · kind A · utility
9Cited by
9References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Jul 30, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television signal selection device comprising the fact that a band to-be-searched within a channel is checked successively from the upper side toward the lower side thereof with a video signal detection output and an AFT voltage output, by the use of a unit search frequency band which is prescribed by the characteristic of a lower-side adjacent voice trap on the lower frequency side and the PLL lock-in range of a video signal demodulator on the higher frequency side. In addition, the checked results are stored as the positions of the unit search frequency bands of the band to-be-searched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.