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1. 发明授权

US07532017B2 Detection of presence or absence of AC maintain power signature in power-over-ethernet system 有权
标题翻译：在以太网供电系统中检测AC的存在或不存在维持功率签名
公开(公告)号：US07532017B2
公开(公告)日：2009-05-12
申请号：US11865977
申请日：2007-10-02
申请人： Douglas Paul Anderson
发明人： Douglas Paul Anderson
IPC分类号： G01R27/08 , G06F1/00 , H01J19/82
CPC分类号： G01R27/16 , H04L12/10
摘要： An AC maintain power signature detection circuit in a power sourcing equipment (PSE) for a Power over Ethernet system injects an AC test signal onto a power port of the PSE. The AC test signal is driven onto a first power terminal of the power port through a sense resistor. The voltages across the sense resistor are measured and scaled by first and second resistor dividers having different resistor ratios. The voltage and the scaled voltage at the first power terminal side of the sense resistor have a peak voltage being proportional to the load impedance of the load coupled to the power port. The comparator compares the scaled voltages measured across the sense resistor and generates the output signal indicative of the load impedance at the power port.
摘要翻译：用于以太网供电系统的电源设备（PSE）中的AC维护功率签名检测电路将AC测试信号注入到PSE的电源端口。交流测试信号通过检测电阻驱动到电源端口的第一个电源端子上。检测电阻两端的电压由具有不同电阻比的第一和第二电阻分压器测量和缩放。检测电阻器的第一电源端侧的电压和标定电压具有与耦合到电源端口的负载的负载阻抗成比例的峰值电压。比较器比较在感测电阻器上测量的定标电压，并产生指示电源端口处的负载阻抗的输出信号。

2. 发明授权

US07865754B2 Power budget management in power over ethernet systems 有权
标题翻译：对以太网系统供电的电力预算管理
公开(公告)号：US07865754B2
公开(公告)日：2011-01-04
申请号：US11865966
申请日：2007-10-02
申请人： William Andrew Burkland , Douglas Paul Anderson
发明人： William Andrew Burkland , Douglas Paul Anderson
IPC分类号： G06F1/00
CPC分类号： H04L12/10
摘要： A power budget monitoring circuit in a multi-port PSE includes a differential amplifier and a transistor for setting a reference voltage across a first resistor to establish a reference current, multiple current mirror output devices each associated with a power port of the PSE, a second resistor and a comparator. Each current mirror output device provides an output current indicative of the power demanded by the associated power port where the output currents are summed at a second node into a monitor current. The second resistor has a resistance value proportional to a maximum power budget of the PSE and receives the monitor current. A monitor voltage develops across the second resistor indicative of the total power demanded by the power ports. The comparator compares the monitor voltage to the reference voltage and provides a comparator output signal indicating whether the maximum power budget of the PSE has been exceeded.
摘要翻译：多端口PSE中的功率预算监控电路包括差分放大器和用于设置第一电阻器两端的参考电压以建立参考电流的晶体管，每个与PSE的电源端口相关联的多个电流镜输出装置，第二电阻和比较器。每个电流镜输出装置提供指示由相关电力端口所要求的功率的输出电流，其中输出电流在第二节点处相加到监视电流中。第二电阻具有与PSE的最大功率预算成比例的电阻值，并接收监视电流。在第二电阻器上形成监测电压，指示电力端口所需的总功率。比较器将监视电压与参考电压进行比较，并提供一个比较器输出信号，指示是否超过了PSE的最大功率预算。

3. 发明申请

US20090055672A1 Power Budget Management In Power Over Ethernet Systems 有权
标题翻译：以太网供电系统中的电力预算管理
公开(公告)号：US20090055672A1
公开(公告)日：2009-02-26
申请号：US11865966
申请日：2007-10-02
申请人： William Andrew Burkland , Douglas Paul Anderson
发明人： William Andrew Burkland , Douglas Paul Anderson
IPC分类号： G06F11/30
CPC分类号： H04L12/10
摘要： A power budget monitoring circuit in a multi-port PSE includes a differential amplifier and a transistor for setting a reference voltage across a first resistor to establish a reference current, multiple current mirror output devices each associated with a power port of the PSE, a second resistor and a comparator. Each current mirror output device provides an output current indicative of the power demanded by the associated power port where the output currents are summed at a second node into a monitor current. The second resistor has a resistance value proportional to a maximum power budget of the PSE and receives the monitor current. A monitor voltage develops across the second resistor indicative of the total power demanded by the power ports. The comparator compares the monitor voltage to the reference voltage and provides a comparator output signal indicating whether the maximum power budget of the PSE has been exceeded.
摘要翻译：多端口PSE中的功率预算监控电路包括差分放大器和用于设置第一电阻器两端的参考电压以建立参考电流的晶体管，每个与PSE的电源端口相关联的多个电流镜输出装置，第二电阻和比较器。每个电流镜输出装置提供指示由相关电力端口所要求的功率的输出电流，其中输出电流在第二节点处相加到监视电流中。第二电阻具有与PSE的最大功率预算成比例的电阻值，并接收监视电流。在第二电阻器上形成监测电压，指示电力端口所需的总功率。比较器将监视电压与参考电压进行比较，并提供一个比较器输出信号，指示是否超过了PSE的最大功率预算。

4. 发明申请

US20090085586A1 DETECTION OF PRESENCE OR ABSENCE OF AC MAINTAIN POWER SIGNATURE IN POWER-OVER-ETHERNET SYSTEM 有权
标题翻译：检测交流电源功率在以太网系统中的存在或不存在
公开(公告)号：US20090085586A1
公开(公告)日：2009-04-02
申请号：US11865977
申请日：2007-10-02
申请人： Douglas Paul Anderson
发明人： Douglas Paul Anderson
IPC分类号： G01R27/16
CPC分类号： G01R27/16 , H04L12/10
摘要： An AC maintain power signature detection circuit in a power sourcing equipment (PSE) for a Power over Ethernet system injects an AC test signal onto a power port of the PSE. The AC test signal is driven onto a first power terminal of the power port through a sense resistor. The voltages across the sense resistor are measured and scaled by first and second resistor dividers having different resistor ratios. The voltage and the scaled voltage at the first power terminal side of the sense resistor have a peak voltage being proportional to the load impedance of the load coupled to the power port. The comparator compares the scaled voltages measured across the sense resistor and generates the output signal indicative of the load impedance at the power port.
摘要翻译：用于以太网供电系统的电源设备（PSE）中的AC维护功率签名检测电路将AC测试信号注入到PSE的电源端口。交流测试信号通过检测电阻驱动到电源端口的第一个电源端子上。检测电阻两端的电压由具有不同电阻比的第一和第二电阻分压器测量和缩放。检测电阻器的第一电源端侧的电压和标定电压具有与耦合到电源端口的负载的负载阻抗成比例的峰值电压。比较器比较在感测电阻器上测量的定标电压，并产生指示电源端口处的负载阻抗的输出信号。

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