Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Patent
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.
Dickes Eric J.
Flegal Robert T.
Hill, III Thomas C.
Grimm Siegfried H.
Noe George T.
Tektronix Inc.
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