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:
Feb. 15, 2011
Filed:
Dec. 28, 2007
Farzin Assar, San Jose, CA (US);
Scott E. Heeren, San Jose, CA (US);
Lee D. Nguyentran, San Jose, CA (US);
Bryan S. Rowan, San Jose, CA (US);
Farzin Assar, San Jose, CA (US);
Scott E. Heeren, San Jose, CA (US);
Lee D. Nguyentran, San Jose, CA (US);
Bryan S. Rowan, San Jose, CA (US);
Hitachi Global Storage Technologies, Netherlands, B.V., Amsterdam, NL;
Abstract
A method of configuring a signal for controlling a voice coil motor (VCM) is disclosed. A voltage at an error amplifier of a VCM driver is accessed. A target value at the error amplifier is accessed. A difference value between the target value and the voltage is determined. An impedance value of the variable compensation coupled with the error amplifier is adjusted, based on the difference value.