PLL frequency synthesizer having a main loop and a secondary loo

Details PLL frequency synthesizer having a main loop and a secondary loo PLL frequency synthesizer having a main loop and a secondary loo

1993-06-16

1994-12-13

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 25, 331 30, H03L 723

Patent

active

053732561

ABSTRACT:
A frequency synthesis system for generating microwaves which includes a main loop with a low gain electronically tunable voltage controlled oscillator (VCO) covering the entire desired frequency bandwidth, and a secondary loop including a direct synthesis section in which frequencies are synthesized directly from a quartz reference which also controls the stability of the oscillator and an indirect synthesis section with a high gain oscillator.

REFERENCES:
patent: 3956703 (1976-05-01), Noordanus et al.
patent: 4114110 (1978-09-01), Nossen
patent: 4234929 (1980-11-01), Riley, Jr.
patent: 4516085 (1985-05-01), Effinger et al.
patent: 4551689 (1985-11-01), Scala et al.
patent: 4763083 (1988-08-01), Edwards
patent: 5128633 (1992-07-01), Martin et al.

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