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:
Dec. 08, 1992
Filed:
Oct. 23, 1990
Applicant:
Inventor:
Kiyoshi Tateishi, Tokorozawa, JP;
Assignee:
501 Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 50 ; 369 54 ; 369 59 ; 360 7301 ;
Abstract
A spindle servo circuit for controlling the speed of rotating a disk. The loop gain of the servo loop is changed in response to the change in the linear velocity when the linear velocity is changed by changing the frequency of a master clock. With this feature, stability of the servo characteristic is always assured so that the speed of data recording is increased by the increase in the linear velocity.