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. 09, 2013
Filed:
Aug. 23, 2011
Applicant:
Toshiyuki Imai, Gunma-ken, JP;
Inventor:
Toshiyuki Imai, Gunma-ken, JP;
Assignee:
ON Semiconductor Trading, Ltd., Hamilton, BM;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 5/00 (2006.01); H02P 6/14 (2006.01); H02P 1/26 (2006.01); H02P 27/04 (2006.01); H02P 7/00 (2006.01); H02P 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A motor drive circuit configured to supply drive currents to drive coils with a plurality of phases of a motor to drive the motor, includes: a trapezoidal wave signal generation circuit configured to output a trapezoidal wave signal whose inclination is changed with a rotation speed of the motor or a target rotation speed of the motor; and a plurality of output transistors configured to output the drive current to the drive coils, respectively, in accordance with the trapezoidal wave signal.