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:
Feb. 03, 1981
Filed:
Nov. 07, 1978
Katsuya Yasutake, Yokohama, JP;
Akiyoshi Morita, Sagamihara, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A capstan servo system is used in a recording and/or reproducing apparatus which is capable of recording/reproducing either video signals of the NTSC system having a frame frequency of 30 Hz or video signals of the CCIR system having a frame frequency of 25 Hz. The capstan servo system detects the rotation of a capstan for driving a tape and produces an output frequency which is divided. A reference signal has a frequency corresponding to the frame frequency of the system of the video signal to be recorded on and/or reproduced from the tape. There is a phase comparison between the frequency divided signal and the reference signal. The frequency of the output signal of the detector is added to an error signal output of the phase comparison circuit. The resulting sum signal is used to control the rotation of the motor for driving the capstan. The detection circuit produces an output signal having a frequency of 150.multidot.M Hz (where M is a positive integer). The frequency division is capable of dividing the frequency of the output signal of the detection circuit with a selected frequency division ratio of 1/5M or 1/6M.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile