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:
Jul. 15, 2003
Filed:
Feb. 29, 2000
Applicant:
Inventor:
Michiya Sako, Kagoshima, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 1/512 ;
U.S. Cl.
CPC ...
G11B 1/512 ;
Abstract
The overvoltage applied on a head during switching of the head is prevented. At the time when the head switching signal changes, a switch S for turning on/off an operational amplifier Gm is turned off, and the operational amplifier Gm is turned off. Simultaneously, the switch S is turned on, the current source I is connected to a capacitor C , and the capacitor C is discharged. Then, switches S and S for switching the MR head are switched. Finally, the switch S is turned off and the switch S is turned on, thus the switching of the MR head is finished.