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:
Nov. 27, 2007
Filed:
May. 23, 2005
Congzhong Huang, Plano, TX (US);
Bryan E. Bloodworth, Irving, TX (US);
Mike Sheperek, Longmont, CO (US);
Congzhong Huang, Plano, TX (US);
Bryan E. Bloodworth, Irving, TX (US);
Mike Sheperek, Longmont, CO (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Managing temperature of a read/write head () in a disk drive system in which there is a power variance due to different operation modes. A circuit device () determines and delivers additional power needed for compensating for the temperature variance due to different operational power requirements. The power is delivered to a resistive heater (Rheat) associated with the head (). The compensating power is based on the delivery voltage, delivery current, and resistance of the resistive heater (Rheat). The delivery current is varied to account for changes in the resistance of the resistive heater (Rheat) since it can vary with temperature. By sensing the current with a sensor (), the resistance is determined via the sensed current and the delivery voltage. The current is adjusted for maintaining the compensating power.