Arrangement for synchronizing a free-swinging oscillator

Details Arrangement for synchronizing a free-swinging oscillator Arrangement for synchronizing a free-swinging oscillator

1978-12-26

1980-06-03

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 25, 331 36C, 331 42, H03B 304

Patent

active

042064210

ABSTRACT:
A system is disclosed for synchronizing a free-swinging oscillator to a reference signal of a substantially lower frequency. A regulating circuit connects to the oscillator to control the frequency thereof. A quartz oscillator is provided for producing the reference signal. The reference signal is subsequently connected to a frequency multiplier and/or frequency divider, an amplifier and a pass band filter. An output signal from the pass band filter is fed to a harmonics mixer connected to the free-swinging oscillator and which produces a pattern of harmonics. A selective amplifier feeds an intermediate frequency obtained from the harmonics mixer to the regulator circuit. A filter also connected to the quartz oscillator produces harmonics which are also coupled to the regulating circuit. By phase or frequency comparison the regulating circuit adjusts the running frequency of the free-swinging oscillator.

REFERENCES:
patent: 2685032 (1954-07-01), Cox
patent: 2719231 (1955-09-01), Hugenholtz
patent: 3231828 (1966-01-01), Craft
patent: 3636467 (1972-01-01), Babany et al.
patent: 3676794 (1972-07-01), Bidell et al.
Schneider et al., "Harmonically Pumped Stripline Down-Converter," IEEE Transactions on Microwave Theory and Techniques, vol. MTT-23, Mar. 1975, pp. 271-275.

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