Dual loop phase locked oscillator system

Details Dual loop phase locked oscillator system Dual loop phase locked oscillator system

1977-11-14

1978-10-17

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

328155, 331 2, 331 25, 360 51, H03B 304

Patent

active

041211723

ABSTRACT:
A dual loop phase locked oscillator system comprises a pair of phase locked oscillators coupled with priority logic gates for selectively operating each oscillator. During a lock-to-data mode, the logic gates are operated so that one of the oscillators is operated by the input data to lock to the data rate, while the other oscillator is operated by the output of the first oscillator to also lock to the data rate. During a normal mode, or coasting mode (when no data is present), each oscillator operates off the output of the other to thereby maintain oscillation at the data rate. Thus, the oscillators are selectively operated in tandem or in parallel.

REFERENCES:
patent: 3662277 (1972-05-01), White
patent: 3701039 (1972-10-01), Lang et al.

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