Fine tuning circuit
US4262307A · kind A · utility
4Cited by
0References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1978 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Nov 27, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/244
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for applying a fine tuning voltage to an oscillator operating within distinct ranges of frequency. The fine tuning voltage is tailored so that a substantially equal fine tuning range, for example, .+-.1.5 MHz, is achieved with respect to each of the ranges of frequency. The circuit includes a potentiometer that is connected between two voltage sources. The values of the voltage sources are appropriately varied in response bandswitch information. In a television receiver the values are varied in response to a signal indicating operation on a Low Band VHF, a High Band VHF, or a UHF channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.