Communication equipment
US4123724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1977 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Aug 1, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/193
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A television receiver is provided comprising a variable frequency local oscillator and frequency synthesizer control means for controlling the frequency of the variable frequency local oscillator in accordance with the setting of variable divider means for effecting channel or frequency tuning of said receiver, the frequency synthesis control means comprising first divider means operable on the output of the variable frequency local oscillator, the first divider means being set to one of a plurality of division ratios under the control of fine tuning means associated therewith, variable divider means operable on the output of the first divider means, and phase/frequency comparator means for comparing the output of the variable divider means with a reference frequency and for affording a control signal to the variable frequency local oscillator for controlling its frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.