Frequency synthesizer having a very high spectral purity

Details Frequency synthesizer having a very high spectral purity Frequency synthesizer having a very high spectral purity

1980-06-20

1982-05-25

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 19, 331 25, H03L 720

Patent

active

043319327

ABSTRACT:
Synthesizer including a VCO-type oscillator covering the range from 300 to 610 MHz and driving a first mixer; a source of 80 MHz standard frequency, followed by a frequency multiplier and a tunable filter driving the first mixer; a second, sampling-type mixer driven on the one hand by the output of the first mixer and on the other hand by the standard frequency divided in a divider by 8. The output from the second mixer controls the frequency of the oscillator.
Application to the production of a synthesizer with very high spectral purity.

REFERENCES:
patent: 3202930 (1965-08-01), Muraszko
patent: 3427561 (1969-02-01), Hamer
patent: 3569838 (1971-03-01), Blair et al.
patent: 3694766 (1972-09-01), Boelke

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