Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Patent
1974-10-29
1976-06-22
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
331 4, 331 17, 331 25, 331178, H03B 310, H03B 2300
Patent
active
039654389
ABSTRACT:
A system for automatically maintaining the center frequency of a swept voltage controlled oscillator. At a known amplitude of sweep voltage input, a lock pulse is actuated. The oscillator output is divided by a number N and applied simultaneously with the reference signal to a phase and/or frequency detector. The detected signal is applied via a gate under the control of such lock pulse to a memorization unit whose output is used to maintain the center frequency.
REFERENCES:
patent: 3274511 (1966-09-01), Dale et al.
patent: 3364437 (1968-01-01), Loposer et al.
patent: 3441870 (1969-04-01), Wicker
Durk Kenneth M.
Grimm Siegfried H.
LaRue Adrian J.
Tektronix Inc.
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