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:
Jun. 02, 1998
Filed:
Apr. 05, 1996
Shozo Yamano, Tokyo, JP;
Nobuhiko Terui, Ichikawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A motor drive unit is provided with a bridge circuit including series connected first and second MOS transistors, series connected third and fourth MOS transistors, a DC motor connected between a junction of the first and second MOS transistors and a junction of the third and fourth MOS transistors, a power supply line connected to the first and third MOS transistors and a ground line connected to the second and fourth MOS transistors. The state of the DC motor is controlled by on/off controlling the MOS transistors of the bridge circuit. The MOS transistors are controlled such that the motor is continuously short-circuited when a power is supplied to the motor drive unit and the motor is not driven.