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:
Aug. 13, 2013
Filed:
Sep. 16, 2010
Applicant:
Kosaku Hioki, Ogaki, JP;
Inventor:
Kosaku Hioki, Ogaki, JP;
Assignees:
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Sanyo Semiconductor Co., Ltd, Gunma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 19/00 (2006.01); G05B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A stepping motor includes two coils. A driver circuit drives the stepping motor by setting dissimilar phases of supply currents to these two coils. One terminal of one coil is connected to ground and another terminal is set to a high impedance state, and an induced voltage generated at that coil is detected as a voltage with respect to ground. Then, in accordance with the state of the detected induced voltage, the magnitude of motor drive current supplied to the two coils is controlled.