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:
Nov. 01, 2005
Filed:
Mar. 30, 2004
Wan-jung Lin, Hsinchu, TW;
Wan-Jung Lin, Hsinchu, TW;
Avid Electronics Corp., Hsinchu, TW;
Abstract
An enhanced CMOS circuit to drive a DC motor is disclosed, in which a CMOS circuit is used to form a driver circuit of the DC motor, replacing a conventional BiCMOS for the part of the driver circuit, which is used in a portable CD player. Two switching stages are each formed by four CMOS transistors connected in series, with one end of the circuit being connected to a positive power supply with a higher voltage and another end connected to ground or negative power supply terminal. The switching stages are able to produce high output voltages, which are applied on the gates of the CMOS transistors in the driver stage to lower the driving impedance of the conduction channel and to produce sufficient output current to drive a DC motor.