Variable frequency U. H. F. local oscillator for a television re

Details Variable frequency U. H. F. local oscillator for a television re Variable frequency U. H. F. local oscillator for a television re

1982-05-24

1985-01-15

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular frequency control means

331117R, 331177V, 332 30V, H03L 700, H03B 518

Patent

active

044940815

ABSTRACT:
A tunable oscillator develops a signal having a frequency variable over a range of frequencies in response to a control signal. A frequency determining resonant circuit includes two voltage-variable capacitance diodes in an arrangement for adjusting at least one endpoint of the frequency range. As a result, the relationship between the magnitude of the control signal and the frequency of the oscillator signal can be adjusted while avoiding mechanically adjustable reactive elements. The disclosed arrangement is suitably employed with resonant circuits other than those in oscillators.

REFERENCES:
patent: 3492514 (1970-01-01), Korn
patent: 3517352 (1970-06-01), Marshall et al.
patent: 4074209 (1978-02-01), Lysobey
patent: 4214217 (1980-07-01), Saito et al.
patent: 4316108 (1982-02-01), Rogers, Jr.
patent: 4369417 (1983-01-01), Kupfer
patent: 4375621 (1983-03-01), Schneiter et al.
patent: 4402089 (1983-08-01), Knight et al.
Shea, Harmonic Oscillators, Section 8.1 and 8.2, pp. 221-223, 1957.

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