| 摘要 |
<p>A system is described for providing closed-circuit power line communication, wherein the system comprises: at least a first and second power line connected to at least one electrical device configured for receiving a data signal; an auxiliary line connected to said electrical devices for providing a ground connection; at least one transmitter for transmitting a first data signal over said first and second power line respectively to said electrical device; and, a low-pass common-mode filter connected to said first and second power line for providing closed-circuit data communication between said transmitter and said electrical device, said filter comprising at least one coupling capacitor between said first and second power line such that at least the polarities with respect to ground of said first data signals transmitted over said first and second power line respectively are substantially similar.</p> |
