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, 1989
Filed:
Jun. 04, 1987
Applicant:
Inventor:
Masanori Suzuki, Tokorozawa, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 46 ; 358907 ; 369 30 ;
Abstract
A tracking servo system for use in an information recording disc player including an equalizing circuit for compensating a frequency characteristic of a tracking error signal generated at a pickup of the disc player. The equalizing characteristic of the equalizing circuit is changed for a predetermined time period after the servo loop is closed during a track jump operation of the disc player. By this feature the servo loop is locked in when a decelerating force is exerted on the actuator of the tracking servo system, thereby to increase the stability of the lock in of the tracking servo system.