Injection locked RF oscillator with control hoop

Details Injection locked RF oscillator with control hoop Injection locked RF oscillator with control hoop

1985-05-31

1986-12-23

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Search sweep of oscillator

331 10, 331 25, 331 36C, 331107DP, 331177V, H03L 712, H03L 724

Patent

active

046314970

ABSTRACT:
An injection locked RF oscillator comprises a variable frequency RF source 12 having a Gunn diode 20 and a varactor 22, and a frequency stable reference oscillator 14 whose output f.sub.i is injected into the source to cause injection locking of the source. The output of a low frequency perturbation oscillator 30 is applied to the varactor and the resultant variation in the current consumption I.sub.o of the Gunn diode detected by amplifier 28 and filter 36 to provide a control signal which is effective to shift the resonant frequency f.sub.o of the source 12 towards the frequency f.sub.i of the reference oscillator, or a harmonic thereof. A sweep-and-lock circuit 44 is provided to acquire injection locking upon switch-on.

REFERENCES:
patent: 2972720 (1961-02-01), Hume
patent: 3534284 (1970-10-01), Beurrier
patent: 3534285 (1970-10-01), Kobold et al.
patent: 3832713 (1974-08-01), Rubin
patent: 3878474 (1975-04-01), Runge
patent: 4297648 (1981-10-01), Tucker et al.
"New Modular Concept for Phase Locked RF Oscillators" by Bernhard et al.,-(published in the Conference Proceedings of the 11th European Microwave Conference, 7 to 10 Sep. 1981, Amsterdam, paper P11, pp. 584 et seq.).

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