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. 06, 2007
Filed:
Jan. 30, 2006
Applicants:
Farzin Assar, San Jose, CA (US);
Lee Duyly Nguyentran, San Jose, CA (US);
Phong Van VU, San Jose, CA (US);
Inventors:
Farzin Assar, San Jose, CA (US);
Lee Duyly Nguyentran, San Jose, CA (US);
Phong Van Vu, San Jose, CA (US);
Assignee:
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
When a HDD is operating at a temperature below a threshold, a partial sine wave is input to the spindle motor to activate the motor to reduce undesirable speed oscillations of the motor. At normal operating temperatures a full sine wave is input for noise reduction.