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. 18, 1984
Filed:
Jun. 27, 1983
Tsuyoshi Matsushita, Shizuoka, JP;
Tokyo Electric Co., Ltd., Tokyo, JP;
Abstract
A motor drive circuit includes ROM in which a plurality of driving speed patterns are stored, a RAM for storing step data indicative of the number of driving rotational steps, and a data processing circuit for supplying motor driving data to a motor control unit in accordance with one of the driving speed patterns selected on the basis of the step data in the RAM. A series of step timing data is included in each of the driving speed patterns. The data processing circuit sequentially reads out the series of step timing data related to the selected driving speed pattern from the ROM and supplies the motor driving data to the motor control unit each time the period of time corresponding to this read-out step timing data elapses.