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:
Jan. 29, 1991
Filed:
May. 19, 1989
Applicant:
Inventor:
Tomihisa Ogawa, Ome, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318561 ; 360 7805 ; 360 7804 ; 360 7806 ; 360 7807 ;
Abstract
The invention comprises a voice coil motor for moving a head for reading information from or writing information to a disk, a driving circuit for supplying current to the voice coil motor in response to a first control signal and for changing the gain of the driving circuit in response to a second control signal. The gain of the driving circuit is increased during a moving control mode (i.e. a seek mode) and decreased during a position control mode (i.e. a track-following mode).