Frequency synthesizer having plural phase locked loops

Details Frequency synthesizer having plural phase locked loops Frequency synthesizer having plural phase locked loops

1982-06-14

1983-06-14

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 4, 331 16, 331 25, 332 19, H03L 718, H03L 722

Patent

active

043885977

ABSTRACT:
A first phase locked loop (PLL) having a second PLL with programmable divider therein supplying 50 kilohertz steps of coarse tuning to a mixer and a third PLL with programmable divider therein providing 50 Hertz fine tuning steps to a phase detector for providing any of a plurality of steps of frequency within a band of frequencies in response to control signals applied to the two programmable dividers.

REFERENCES:
patent: 3268831 (1966-08-01), Noordanus et al.
patent: 3480883 (1969-11-01), Gaunt, Jr.
patent: 4149125 (1979-04-01), Ikeguchi et al.
patent: 4191930 (1980-03-01), Harzer
patent: 4225830 (1980-09-01), Remy

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