Dual loop phase locked circuit with sweep generator and compensa

Details Dual loop phase locked circuit with sweep generator and compensa Dual loop phase locked circuit with sweep generator and compensa

1992-05-29

1993-05-11

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Search sweep of oscillator

331 15, 331 17, 331DIG2, H03L 712

Patent

active

052105091

ABSTRACT:
A dual loop phase locked circuit is disclosed in which a first loop includes a phase detector, a filter, and a VCO; as a second loop includes a sweep voltage generator, a compensation circuit, and the filter of the first loop. Due to the compensation circuit, the VCO accurately tracks a signal from the sweep voltage generator, even though the filter has an electrical parameter that drifts with time and/or age and/or component selection.

REFERENCES:
patent: 4617527 (1986-10-01), Naitoh
patent: 4788512 (1988-11-01), Hogge, Jr. et al.
patent: 4970472 (1990-11-01), Kennedy et al.
patent: 5091702 (1992-02-01), Foell

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