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:
Jan. 04, 2011
Filed:
Apr. 30, 2007
Pieter Vorenkamp, Laguna Niguel, CA (US);
Agnes Woo, Encino, CA (US);
Anil Tammineedi, Los Angeles, CA (US);
Ichiro Fujimori, Irvine, CA (US);
David Chin, Los Altos, CA (US);
John Perzow, Fort Collins, CO (US);
Pieter Vorenkamp, Laguna Niguel, CA (US);
Agnes Woo, Encino, CA (US);
Anil Tammineedi, Los Angeles, CA (US);
Ichiro Fujimori, Irvine, CA (US);
David Chin, Los Altos, CA (US);
John Perzow, Fort Collins, CO (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Power over Ethernet (PoE) communication systems provide power and data communications over the same communications link, where a power source device (PSE) provides DC power (for example, 48 volts DC) to a powered device (PD). The DC power is transmitted simultaneously over the same communications medium with the high speed data from one node to the other node. The PSE typically includes a controller that controls the DC power provided to the PD at the second node of the communications link. The PSE controller measures the voltage, current, and temperature of the outgoing and incoming DC supply lines to characterize the power requirements of the PD. In addition, the PSE controller may detect and validate a compatible PD, determine a power classification signature for the validated PD, supply power to the PD, monitor the power, and reduce or remove the power from the PD when the power is no longer requested or required. The PSE controller also monitors for a Maintain Power Signature (MPS). The PSE controller removes power from the PD if the MPS condition is absent for longer than its related time limit. The MPS consists of two components: an AC MPS component and a DC MPS component. The PSE controller may optionally monitor the AC MPS component only, the DC MPS component only or both the AC and the DC MPS components.