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. 18, 2000
Filed:
Dec. 30, 1998
Applicant:
Inventors:
Marcello Criscione, Ragusa, IT;
Luigi Occhipinti, Ragusa, IT;
Assignee:
STMicroelectronics S.r.l., Agrate Brianza, IT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323222 ; 323224 ; 323284 ;
Abstract
A DC/DC conversion circuit, adapted to convert a DC input voltage to a DC output voltage, employs a PNP type of bipolar power transistor as a synchronous rectifier element, to allow power-on through a simplified control circuitry capable of sensing, automatically and at a high speed, the difference of potential across the switch. This approach allows power to be transferred from the input to the output unilaterally, while automatically controlling the depth of saturation of the power transistor and regulating its base current.