Fine tuning circuit

Details Fine tuning circuit Fine tuning circuit

1978-11-27

1981-04-14

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581911, 455182, H04N 550

Patent

active

042623073

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.

REFERENCES:
A. Hashima "A Television Tuning Method With Automatic Band Switching", Transactions on Joint Conference of W. Japanese Branches of Electrical & Electronic Engineering, Oct. 20, 1978.

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