| 摘要 |
Disclosed is a line interface circuit for power line communication for connecting a power line modem to a power line. The line interface circuit uses a loop via a neutral line (LP1), wherein the neutral line is grounded, together with a loop via ground (LP2) based on existing groundings in a household. The line interface circuit includes a hot line connection terminal (1), a neutral line connection terminal (2), and a ground line connection terminal (4). In a case where a ground-line wire (L3) is not installed in a household, or the installed ground-line wire (L3) is not installed to meet standard requirements, the loop via the neutral line (LP1) can be used for communication in the same manner as in the prior art. In a case where the ground-line wire (L3) is installed to meet standard requirements, the loop via ground (LP2) can be used for communication. The loop via ground LP2 has a signal gain higher than that of the loop via the neutral line LP1 by 15dB. |
