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:
Jan. 30, 1990
Filed:
Mar. 25, 1988
Kazuki Miyamoto, Yokohama, JP;
Yutaka Komiya, Tokyo, JP;
Masato Ishida, Yokohama, JP;
Shinichi Nakamura, Tokyo, JP;
Masanori Miyata, Yokohama, JP;
Masayuki Hirose, Yokohama, JP;
Masahiro Tomosada, Kawasaki, JP;
Hideki Adachi, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided a motor control device comprising a motor; an apparatus for entering the number of revolutions of the motor; a detector that detects the number of revolutions of the motor; and a microcomputer for entering the output from the detector and a controlling the motor according to predetermined programs, wherein the microcomputer comprises a counter to which a count value is set according to a circuit from the input to form a reference frequency signal and a circuit for forming a phase error signal according to the reference frequency signal and the output of the detector and outputs a signal for driving the motor based on the phase error signal.