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:
Nov. 23, 1993
Filed:
Jun. 11, 1992
Takeo Tamura, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A servo circuit for controlling an actuator provided on an optical pickup of a disc reproducing apparatus, the optical pickup optically reading out an information signal recorded on a disc is comprised of a phase compensating unit including a first phase compensator circuit whose gain characteristic and phase characteristic are set to first characteristics and a second phase compensator circuit whose gain characteristic and phase characteristic are set to second characteristics, the first and second phase compensator circuits being selectively coupled, a detecting circuit for detecting an oscillation of the actuator, and a switching circuit for switching the first and second phase compensator circuits from one to the other on the basis of an output from the detecting circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile