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. 10, 2009
Filed:
Jun. 03, 2004
Tony Hurtado, Cupertino, CA (US);
Wentao Yan, Fremont, CA (US);
Lin Guo, Saratoga, CA (US);
Chris Hawks, Saratoga, CA (US);
Don Brunnett, Pleasanton, CA (US);
Thao Nguyen, San Jose, CA (US);
Richard Oswald, San Jose, CA (US);
Erhard Schreck, San Jose, CA (US);
Tony Hurtado, Cupertino, CA (US);
Wentao Yan, Fremont, CA (US);
Lin Guo, Saratoga, CA (US);
Chris Hawks, Saratoga, CA (US);
Don Brunnett, Pleasanton, CA (US);
Thao Nguyen, San Jose, CA (US);
Richard Oswald, San Jose, CA (US);
Erhard Schreck, San Jose, CA (US);
Maxtor Corporation, Scotts Valley, CA (US);
Abstract
A control source and drivers for a thermal actuator fly height controlled heads in a disk drive system includes provisions for driving a heater element to dissipate various levels of power, and thus actuate the head by a desired amount, depending on whether the head is in a write mode or a read mode. Further, overshoot and undershoot are achieved as desired by providing initial values and equilibrium values and through the use of a control capacitor to provide a time constant to the drive signal to the heater element.