Invention Grant
US08412961B2 Circuit and method for detecting a legacy powered device in a power over Ethernet system
有权
用于在以太网供电系统中检测传统电源设备的电路和方法
- Patent Title: Circuit and method for detecting a legacy powered device in a power over Ethernet system
- Patent Title (中): 用于在以太网供电系统中检测传统电源设备的电路和方法
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Application No.: US12762184Application Date: 2010-04-16
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Publication No.: US08412961B2Publication Date: 2013-04-02
- Inventor: John Christopher Gammel , Endre Kovaks
- Applicant: John Christopher Gammel , Endre Kovaks
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Cesari & Reed LLP
- Agent R. Michael Reed
- Main IPC: G06F1/00
- IPC: G06F1/00 ; G06F15/177 ; H04B1/38
Abstract:
In an embodiment, a power source equipment (PSE) device includes a network port configurable to couple to a network cable and a detection circuit coupled to the network port. The detection circuit is configured to apply a powered device (PD) detection voltage signal including first and second voltages to the network port and to sample a line current of the network port in response to the first and second voltages to detect a complex impedance indicating that a legacy PD is coupled to the network port.
Public/Granted literature
- US20110258464A1 Circuit and Method for Detecting a Legacy Powered Device in a Power over Ethernet System Public/Granted day:2011-10-20
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