Varactor control unit using Q variable inductances

Details Varactor control unit using Q variable inductances Varactor control unit using Q variable inductances

1974-11-26

1976-04-06

Mayer, Albert J.

H04B 116

Patent

active

039493083

ABSTRACT:
A circuit for providing TV channel selection and tuning voltages utilizes a plurality of fixed resistors and a plurality of Q variable inductances. A channel selection switch connects particular resistors and Q variable inductances for channel selection and fine tuning. The Q variable inductances are used for fine tuning and are connected in circuit with an oscillator and a detector. The Q variable inductances each have an adjustable steel core with the position of the core determining the amplitude of the detected oscillator voltage and thus the fine tuning control voltage.

REFERENCES:
patent: 2196881 (1940-04-01), Wheeler
patent: 3196350 (1965-07-01), Dimon
patent: 3264566 (1966-08-01), Kaufman et al.

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