Phase lock loop having switchable filters and oscillators

Details Phase lock loop having switchable filters and oscillators Phase lock loop having switchable filters and oscillators

1982-07-22

1985-04-09

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 2, 331 8, 331 16, 331 17, 331 27, 331 36C, 331111, 331DIG2, H03L 710

Patent

active

045104611

ABSTRACT:
A phase lock circuit including a phase/frequency detector, a plurality of selectable filters, and a plurality of variable frequency signal generators connected in a loop to lock an output signal to an input signal. An out-of-frequency-range condition detector is provided to facilitate automatic selection of an appropriate in-range combination of filter and signal generator to cause lock to occur.

REFERENCES:
patent: 3431509 (1969-03-01), Andrea
patent: 3538450 (1970-11-01), Andrea et al.
patent: 3729688 (1973-04-01), Cerny, Jr. et al.
patent: 3909735 (1975-09-01), Anderson et al.

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