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The feasibility of adding a common-mode (CM) choke in the analog front end (AFE) circuit of a power line communication (PLC) modem to reduce the CM noise coupling onto the power line is investigated. Based on a two-current-probe measurement approach, the CM and the differential-mode (DM) equivalent electrical models of a PLC modem are first developed. Both the CM and the DM attenuations due to the...
One of the major concerns in designing a modem for power line communication (PLC) is the existence of common mode (CM) RF current, which generates radiated emissions that could interfere with some other communications users. Magnetic transformers have long been used in the analog front end (AFE) circuit of PLC modems to transmit high frequency (1 to 30 MHz) broadband signals onto power network and...
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