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. 24, 1993
Filed:
Sep. 13, 1990
Tatsuya Narahara, Kanagawa, JP;
Yoshiteru Kamatani, Kanagawa, JP;
Kiyoshi Ohsato, Chiba, JP;
Hiroshi Miyoshi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A control circuit for controlling the position of a head in an optical tape recording/reproducing device having a rotary optical head controls the position of the head at the instant that it faces the tape based upon a desired head position derived from a preceding period in which it was facing the tape. A head position error signal is sampled and added to a sample head position signal during a period when the head is facing the tape and is held during the time the head is not facing the tape. The instant the head begins to face the tape once again, this desired value that has been held is applied to the head in order to reduce the pull-in time of the control circuit and provide more time for information recording/reproduction during the time the rotary optical head is facing the tape.