Frequency and phase lock loop with separated AFC and phase locki

Details Frequency and phase lock loop with separated AFC and phase locki Frequency and phase lock loop with separated AFC and phase locki

1980-07-28

1982-08-31

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 25, 331 31, H03L 710

Patent

active

043474837

ABSTRACT:
A frequency and phase lock loop is disclosed in which AFC and phase locking functions are completely separated thus permitting signal acquisition range and closed loop bandwidth parameters to be independently established. Interference between phase lock loop (PLL) and automatic frequency control (AFC) signals resulting in the loss of a beat frequency signal for matching VCO and reference signal frequencies is eliminated thus affording enhanced PLL frequency pull-in range.

REFERENCES:
patent: 4072909 (1978-02-01), Citta
patent: 4156204 (1979-05-01), Hargis
patent: 4188589 (1980-02-01), Brown et al.

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