Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source
Patent
1999-05-18
2000-01-18
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
With reference oscillator or source
327 7, 324 7682, 702 72, G01R 2500, H03L 7085
Patent
active
060160802
ABSTRACT:
A system for measuring a phase difference between two input signals, including a computer performing computations in the complex domain and operating on two complex signals indicative of the two input signals respectively to compute the phase difference. Alternately, the system for measuring the phase difference includes a computer operating on two input buses indicative of the two input signals respectively to generate a signal indicative of the phase difference, and wherein: A. each input bus includes at least two digital bits; B. the two input buses are indicative of the phase of each of the two input signals; C. the two input buses each has a different range of possible values and wherein the computer further includes a device for normalizing at least one of the buses so as to bring the two buses to the same range. A phase-lock loop includes the system for measuring the phase difference, a VCO and digital devices.
REFERENCES:
patent: 5343404 (1994-08-01), Girgis
patent: 5574408 (1996-11-01), Zwack
Zuta Idan
Zuta Marc
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