Patent ID: 9231659
Filing Date: 2016-01-05
CPC Classification: H04B

Claim Text:
1. A power line communication (PLC) device with noise detecting and filtering functions, comprising: a power receiving port having an end connected to a power supply unit in order to receive a power signal and a network signal from the power supply unit; a first filtering unit having an end connected to an opposite end of the power receiving port, wherein the first filtering unit is a high-pass filter configured for blocking passage of the network signal but allowing passage of the power signal; a power output port having an end connected to an opposite end of the first filtering unit and an opposite end connected to a load, for transmitting the power signal passing through the first filtering unit to the load; a second filtering unit having an end connected to a line between the first filtering unit and the power output port, wherein the second filtering unit is a low-pass filter configured for blocking passage of the power signal but allowing passage of a noise generated in the power signal by the load; a relay having an end connected to an opposite end of the second filtering unit and an opposite end connected to a line between the first filtering unit and the power receiving port, wherein the relay is configured to be switched to a closed state for connecting the second filtering unit with the line between the first filtering unit and the power receiving port, or switched to an open state for disconnecting the second filtering unit with the line between the first filtering unit and the power receiving port; and a processing unit connected to the line between the first filtering unit and the power receiving port, the processing unit being provided therein with a bridge module and a detection module, the bridge module of the processing unit being configured for receiving the network signal and transmitting the network signal to a network apparatus, the detection module of the processing unit being configured for detecting a level of the noise passing through the second filtering unit when the relay is in the closed state.