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:
Jun. 07, 1994
Filed:
Dec. 29, 1992
Applicant:
Inventors:
Motoyasu Yoshino, Kyoto, JP;
Fumihiko Ito, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318254 ; 318138 ;
Abstract
A motor control circuit includes a driver which amplifies a drive signal and outputs a drive current to a coil of a motor ; a detection circuit which detects a drive waveform of the drive current and outputs a detection pulse representing a rotating condition of the motor as a detection signal ; and a drive signal generating circuit which generates in response to the detection pulse a trapezoidal wave having a linear inclination at front and rear parts thereof as the drive signal.