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:
Jul. 16, 1985
Filed:
Sep. 13, 1983
Hiroshi Izumi, Tamayama, JP;
Hiroshi Koike, Morioka, JP;
Alps Electric Co., Ltd., , JP;
Abstract
A circuit for driving a stepping motor comprises a sensor for detecting when the stepping motor is in a hold position, a counter for counting an output from the sensor, a hold pulse pattern generator for generating a hold pulse pattern to hold the stepping motor in the hold position, a shift circuit for shifting the hold pulse pattern from the hold pulse pattern generator, an inverter circuit for inverting hold pulse pattern from the hold pulse pattern generator, and a comparator for comparing an output from the counter with a reference value and producing an output to select one of the hold pulse pattern from the hold pulse pattern generator, a shifted hold pulse pattern from the shift circuit, and an inverted hold pulse pattern from the inverter circuit.