发明授权
US07685452B2 Method for high voltage power feed on differential cable pairs from a network attached power sourcing device
失效
用于从网络连接的电源装置的差分电缆对上进行高压电力馈送的方法
- 专利标题: Method for high voltage power feed on differential cable pairs from a network attached power sourcing device
- 专利标题(中): 用于从网络连接的电源装置的差分电缆对上进行高压电力馈送的方法
-
申请号: US11287408申请日: 2005-11-23
-
公开(公告)号: US07685452B2公开(公告)日: 2010-03-23
- 发明人: John R. Camagna , Philip Crawley , Sajol Ghoshal
- 申请人: John R. Camagna , Philip Crawley , Sajol Ghoshal
- 申请人地址: US CA Folsom
- 专利权人: Akros Silicon Inc.
- 当前专利权人: Akros Silicon Inc.
- 当前专利权人地址: US CA Folsom
- 主分类号: G06F1/00
- IPC分类号: G06F1/00 ; G06F11/30
摘要:
Embodiments of the present invention provide a power feed circuit operable to supply an Ethernet power signal to a coupled Ethernet network. This power feed circuit includes a number of input nodes, differential transistor pairs, active control circuits and output nodes. The input nodes receive a first power signal such as that provided by an isolated 48 volt power supply. Each transistor of the differential transistor pairs couples to one input node. These differential transistor pairs produce a second power signal which may be supplied to the Ethernet network. The active control circuits sense the second power signal passed by each transistor and are operable to apply a feedback signal to the differential transistor pairs based on the sensed power signal. At least one twisted pair couples to each differential transistor pair's output node and is operable to pass the Ethernet power signal.