Invention Grant
- Patent Title: Power sourcing equipment having bipolar junction transistor for controlling power supply and supporting AC disconnect-detection function
- Patent Title (中): 具有双极结型晶体管的电源设备，用于控制电源并支持交流断开检测功能
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Application No.: US11406334Application Date: 2006-04-19
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Publication No.: US08014412B2Publication Date: 2011-09-06
- Inventor: Jacob Herbold
- Applicant: Jacob Herbold
- Applicant Address: US CA Milpitas
- Assignee: Linear Technology Corporation
- Current Assignee: Linear Technology Corporation
- Current Assignee Address: US CA Milpitas
- Agency: McDermott Will & Emery LLP
- Main IPC: H04L12/28
- IPC: H04L12/28 ; H04L12/56 ; H01L21/70 ; H02M7/02 ; H04M9/00
Abstract:
A power supply system for providing power to a powered device over a communication link includes a power supply device capable of supporting an AC disconnect-detect function. The power supply device has a controller, an output port coupled to the communication link, and a bipolar junction transistor (BJT) controlled by the controller to provide power to the output port. The BJT may be turned off to present a high impedance required to support the AC disconnect-detection function.
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