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. 02, 1983
Filed:
Jun. 11, 1981
Daiki Nabeshima, Kamakura, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A servo-positioning system for controlling the positioning of a read-out light beam in an optical system which reads out digital information from a pre-recorded disc including a wobbling means for wobbling a read-out beam to traverse an information track of the disc, a photo detecting means for detecting the read-out beam reflected from the disc, a waveform arranging means for arranging the output of photo detecting means, an extracting means for extracting a clock signal component from the output of the waveform arranging means, a latch circuit for latching the output of the waveform arranging means synchronized with the output signal of the extracting means, a subtracting means for subtracting the output of the latch circuit from the output of the photo detecting means, to isolate the wobbling signal component from the output of the composite photo detecting means including an information component and a wobbling component.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile