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:
Oct. 12, 2004
Filed:
Feb. 14, 2003
Applicant:
Inventors:
Ezio Galbiati, Agnadello, IT;
Michele Boscolo, Sottomarina, IT;
Assignee:
STMicroelectronics S.R.L., Agrate Brianza, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/5387 ;
U.S. Cl.
CPC ...
H02M 3/5387 ;
Abstract
The present invention relates a Pulse Width Modulation (PWM)/linear driver for an electromagnetic load by a bridge circuit of the type having a signal input and a signal output and at least two conduction control inputs for driving a voice coil motor in a linear mode and in a pulse width modulation. The bridge circuit is driven by a PWM converter coupled to one of said two control inputs and by a linear amplifier coupled to the other of said two control inputs.