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:
Mar. 28, 1995
Filed:
Mar. 24, 1993
Applicant:
Inventor:
Yutaka Saito, Kawaguchi, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 4435 ; 369 4425 ; 369 4429 ; 369 4441 ;
Abstract
An optical disc apparatus generates a tracking error signal and a focusing error signal for an objective lens. In addition, the apparatus generates a tracking sum signal or a focusing sum signal for the objective lens. The apparatus multiplies the sum signal by the tracking error signal and the sum signal by the forcing error signal. Corresponding to the results of multiplications, the apparatus moves the objective lens in the tracking direction and focusing direction.
Saito, Yutaka. (1995). Optical disc apparatus having automatic gain control circuit of open (U.S. Patent No. 5402404). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5402404
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile