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:
Oct. 09, 2007
Filed:
Jan. 31, 2005
Shimon Elkayam, Kfar Sava, IL;
Amir Peleg, Tel Aviv, IL;
Nadav Barnea, Neve Savion, IL;
Dror Korcharz, Bat Yam, IL;
Shimon Elkayam, Kfar Sava, IL;
Amir Peleg, Tel Aviv, IL;
Nadav Barnea, Neve Savion, IL;
Dror Korcharz, Bat Yam, IL;
PowersDsine, Ltd.-Microsemi Corporation, Hod Hasharon, IL;
Abstract
A method for preventing an excess voltage from appearing at an output of a power over Ethernet controller, the method comprising: sensing that a powered device has been disconnected from a port; enabling a bypass path around a means for unidirectional current flow operatively connected to the port; and disconnecting power to the port responsive to the sensed disconnect, whereby the bypass path enables a discharge path for an output capacitor present across the port. The invention also provides for a circuit having a bypass path around a means for unidirectional current flow, the bypass path being enabled by a control circuit to prevent an excess voltage from appearing at a sensing input of the control circuit. In an exemplary embodiment the bypass path is enabled approximately simultaneously with disconnecting power from the output port.