Ultra low phase noise microwave synthesizer

Details Ultra low phase noise microwave synthesizer Ultra low phase noise microwave synthesizer

1993-05-12

1994-12-20

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 11, 331 14, 331 16, 331 25, 455260, H03L 7087, H03L 720, H03L 723

Patent

active

053749022

ABSTRACT:
An ultra low phase noise microwave synthesizer for providing an output signal having a frequency F.sub.O of from 2 GHz to 20 GHz using a first voltage controlled oscillator (VCO), a first frequency comparing circuit for driving said first VCO to a first selected frequency (F.sub.idle), a first circuit including a first harmonic sampler for phase locking said first VCO to said first selected frequency (F.sub.idle), a second VCO, a second frequency comparing circuit coupled to said first VCO for driving said second VCO to a second selected frequency (F.sub.coarse), a second circuit coupled to said first VCO including a second harmonic sampler for phase locking said second VCO to said second selected frequency (F.sub.coarse), a third VCO, and a third circuit coupled to said second VCO including a third harmonic sampler for phase locking said third VCO to said frequency F.sub.O.

REFERENCES:
patent: 4763083 (1988-08-01), Edwards

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