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:
Dec. 05, 2000
Filed:
Apr. 09, 1999
Applicant:
Inventors:
Tomoaki Uegami, Kyoto, JP;
Takahiro Sakaguchi, Musashino, JP;
Assignees:
Rohm Co., Ltd., Kyoto, JP;
Teac Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ; H02P / ; H02P / ;
U.S. Cl.
CPC ...
318364 ; 318365 ; 318366 ; 318450 ; 318453 ; 318375 ; 318269 ; 318272 ; 318759 ; 360 741 ; 369234 ; 369235 ; 369268 ;
Abstract
A motor driver has a braking control circuit. The braking control circuit shuts off the supply of an electric current to the coils included in the motor when a motor control signal shifts to a predetermined level and, after a predetermined length of time secured in accordance with an index signal, starts application of braking to the rotation of the motor by the use of a braking circuit. The index signal is obtained from the signal that indicates the rotational position of the motor. The motor control signal is fed from a control signal generating circuit to the braking control circuit.