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US 3,992,679 AGranted
Locked oscillator having control signal derived from output and delayed output signals
AssigneeSony Corporation
InventorKatsuo Isono
Life of this patent
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AssigneeSony Corporation
InventorKatsuo Isono
Estimating the term…
A stabilized frequency oscillating circuit comprises a voltage or current controlled variable frequency oscillator, a delay device receiving the output of the oscillator, an adder for adding the output of the oscillator and the delayed output of the delay device, and a detecting circuit which detects the amplitude of the output of the adder to provide a control signal which varies cyclically with changes in the oscillating frequency of the oscillator which is applied to the latter for locking the oscillating frequency of the oscillator to a predetermined or desired frequency. The oscillating circuit may further have a control circuit by which an additional control voltage or current is superimposed on the cyclically varying control signal for selecting the oscillating frequency to which the variable frequency oscillator is to be locked, or by which either the oscillator output or delayed output is phase-shifted before being applied to the adder.
A stabilized frequency oscillating circuit comprising, a variable frequency oscillator for providing an output at a frequency determined by the amplitude of a control signal applied to said oscillator;
A stabilized frequency oscillating circuit comprising, a variable frequency oscillator for providing an output at a frequency determined by the amplitude of a control signal applied to said oscillator;
A stabilized frequency oscillating circuit comprising, a variable frequency oscillator for providing an output at a frequency determined by the amplitude of a control signal applied to said oscillator, delay means receiving said output of the oscillator for providing a delayed output, means for adding the outputs of said oscillator and delay means, respectively, and providing therefrom a synthesized control signal having an amplitude which varies cyclically in response to changing of the frequency of said output of the oscillator, and means for applying said synthesized control signal to said oscillator as at least part of said control signal for the latter so as to lock said output of the oscillator to a desired frequency.
Dependencies are inferred from the claim text.