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:
Apr. 07, 2020
Filed:
Jan. 11, 2017
Applicant:
Osram Gmbh, Munich, DE;
Inventors:
Paolo De Anna, VallĂ di Riese Pio X, IT;
Enrico Raniero, Coediverno di Vigonza, IT;
Assignee:
OSRAM GMBH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 15/18 (2006.01); G01R 19/00 (2006.01); H02M 1/08 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
G01R 15/183 (2013.01); G01R 19/003 (2013.01); G01R 19/0092 (2013.01); H02M 1/08 (2013.01); H02M 2001/0009 (2013.01);
Abstract
A current sensing circuit for sensing an intermittent current having a Zero Current Period includes: an amperometric transformer having a primary winding for the current to be sensed to flow therethrough and a secondary winding, a sensing resistor coupled to the secondary winding of the transformer, an offset capacitor coupled with sensing resistor between the sensing resistor and ground, and a switch element acting across the coupling of the sensing resistor and the offset capacitor, the switch element being electrically conductive during the zero current period or a fraction thereof.