Radar exciter local oscillator phase lock acquisition control ci

Details Radar exciter local oscillator phase lock acquisition control ci Radar exciter local oscillator phase lock acquisition control ci

1996-09-18

1997-12-30

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Search sweep of oscillator

331 16, 331 19, 331 25, 331DIG2, 327156, H03L 712, H03L 716, H03L 720

Patent

active

057035385

ABSTRACT:
A phase lock acquisition control circuit for the local oscillator (LO) of a radar exciter. The control circuit includes a programmable logic array, a microsequencer and a counter employed as a divide-by-eight circuit which supplies a clock reference for the control circuit. The counter in turn is clocked by a crystal based oscillator also used as the reference for the exciter phase lock loop. The marker filter and zero beat detector provide frequency location information to the control circuit. The control circuit controls a ramp generator circuit which in turn can drive the phase lock loop VCO during acquisition.

REFERENCES:
patent: 5015971 (1991-05-01), Taylor et al.

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