The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 1986
Filed:
Aug. 21, 1981
Kazuo Tatsuguchi, Sagamihara, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A jitter compensation system in a rotary recording medium reproducing apparatus having a motor for rotating a rotary recording medium, and a reproducing transducer including a reproducing element for reproducing a recorded video signal from said rotary recording medium, comprises a separation circuit for separating a horizontal synchronizing signal from the video signal reproduced by the reproducing transducer, a circuit for supplying a reference signal, a phase comparator for comparing phases of the separated horizontal synchronizing signal and the reference signal supplied thereto, to produce a phase comparison error signal, a circuit for displacing the reproducing element of the reproducing transducer along a relative scanning direction with respect to the rotary recording medium, in response to the output error signal of the phase comparator, a variable frequency oscillator supplied with the output error signal of the phase comparator, and controlled of the output oscillation frequency, a detection circuit for detecting the rotational phase of the motor, and a control circuit for comparing phases of outputs of the variable frequency oscillator and the detection circuit, and controlling the rotation of the motor by an output error signal obtained as a result of the phase comparison.