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:
Dec. 02, 2003
Filed:
Jun. 26, 2001
Applicant:
Inventors:
Tirdad Sowlati, Ossining, NY (US);
Sifen Luo, Hartsdale, NY (US);
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 2/502 ;
U.S. Cl.
CPC ...
G01R 2/502 ;
Abstract
A shorting element, preferably a resonant inductor-capacitor circuit, is inserted in parallel with a sense transistor, which itself is in parallel with a power transistor. The use of the shorting element in combination with the sense transistor, provides a technique to have a monotonic power detection. The shorting element eliminates extraneous currents caused by inherent collector-base and collector-substrate diodes of sense transistor, and also eliminates the extraneous collector voltage swing of the sense transistor caused by mutual coupling between inductors connected to the power and sense transistors.