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:
Feb. 22, 1994
Filed:
Mar. 18, 1993
Eiji Shinozaki, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A stepping motor driver circuit first and second push-pull circuits having first and second output terminals, respectively, first and second driving circuits for driving the first and second push-pull circuits in opposite phases relative to each other, respectively, and first and second holding circuits for driving the first and second push-pull circuits, respectively, so that the output voltage between the first and second output terminals may be reduced to a predetermined holding voltage when a predetermined load is held. Here, each of the first and second holding circuits includes a constant-current source for setting a predetermined constant current, a constant-voltage source for supplying a predetermined reference voltage to set the holding voltage, and an amplifier circuit of the current feedback type for inputting the reference voltage and operating with the constant current.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile