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. 03, 1989
Filed:
Jun. 19, 1987
Kiyoshi Ota, Neyagawa, JP;
Kazuo Arai, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
There is disclosed a phase controller comprising: a motor; a rotation detector for converting a motor rotating condition into a speed signal and a phase signal; a speed comparison circuit for detecting a difference between the speed signal and a speed target value; a resettable phase signal generating circuit for generating a phase reference signal; a phase comparison circuit for detecting a phase difference between the phase signal and the phase reference signal and outputting a reset signal to the phase signal generating circuit according to the output of the speed comparison circuit; a synthesizing circuit for synthesizing the output of the speed comparison circuit and the output of the phase comparision circuit; and a motor driving circuit for driving the motor according to the output of the synthesizing circuit. By resetting the phase reference signal according to the motor phase, the phase control pulling-in time is reduced to improve response.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile