Effective low voltage to medium voltage transmission on PRIME band

摘要

Coupling and interface circuits for powerline modems are disclosed. A powerline modem may be coupled to a low voltage (LV) line or a medium voltage (MV) line using a circuit that is designed to compensate for signal attenuation and loss that is created by the a LV/MV transformer and/or a MV coupler. In one embodiment, separate coupling transformers may be used by the modem for reception and transmission. In other embodiments, a capacitance is switched on the transmission line before the modem transmits to lower the line impedance.

主权项

1. An interface for communication on a powerline communication network, comprising:
a transmission transformer adapted to couple signals transmitted from a modem to a medium voltage line on the powerline communication network, the transmission transformer having a first turns ratio selected to amplify the signals transmitted from the modem, and wherein the second turns ratio for the receive transformer is selected to amplify the signals received from the powerline communication network; and a receiver transformer adapted to couple signals received from the medium voltage line on the powerline communication network to the modem, the receiver transformer having a second turns ratio that is greater than the first turns ratio.