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:
Mar. 15, 2005
Filed:
May. 14, 2003
Applicants:
Natale Aiello, Trecastagni, IT;
Francesco Giovanni Gennaro, Catania, IT;
Inventors:
Natale Aiello, Trecastagni, IT;
Francesco Giovanni Gennaro, Catania, IT;
Assignee:
STMicroelectronics S.r.l., Agrate Brianza, IT;
Primary Examiner:
Int. Cl.
CPC ...
H02J003/00 ; G05F001/66 ;
U.S. Cl.
CPC ...
Abstract
A method for detecting a null current condition in a PWM driven inductor connected between a voltage source node and a second circuit node of a line for outputting current to a load includes generating a derivative signal by time differentiating a voltage on the second node. The method further includes monitoring an instant when the derivative signal becomes negative, and signaling verification of the null current condition each time the derivative signal becomes negative.