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Circuits and methods for detecting the presence of a powered device in a powered network
Circuits and methods for detecting the presence of a powered device in a powered network
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机译:用于检测受电网络中受电设备的存在的电路和方法
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摘要
Circuits and methods for detecting the presence of a powered device in a powered network connection and removing power from the powered network connection when no powered device is present are disclosed. The circuits and methods involve applying a time-varying voltage signal into an analog amplifier circuit that converts the voltage into a current indicative of the impedance of the connection. The analog amplifier circuit may be implemented with a dual-output trans-conductance amplifier that provides a digital voltage to indicate the removal of the powered device from the powered network connection.
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