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:
Aug. 09, 2011
Filed:
Mar. 26, 2007
Luis DE LA Torre Vega, Madrid, ES;
Fadi Saibi, Mountain View, CA (US);
Luis de la Torre Vega, Madrid, ES;
Fadi Saibi, Mountain View, CA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
In one embodiment, a method for determining capacitive signature validity of a powered device (PD) attached to power sourcing equipment (PSE) having (i) an isolated side with a primary coil and (ii) a line side with a secondary coil connected to the PD. The method includes determining, on the isolated side, a first time Tand a corresponding first voltage Vacross the PD. Then generating, on the isolated side, a switching signal used to generate an electrical current through the primary coil. Then determining, on the isolated side, a second time Tand a corresponding second voltage Vacross the PD, wherein a difference between Vand Vis related to the electrical current provided to the primary coil. Then determining the capacitive-signature validity of the PD based on T, T, V, V, and a resistive signature of the PD.