Abstract:

The complexity of transmission characteristic of low voltage power line and variability of interference signal makes its promotion limited.Based on the principle of high and low frequency circuit,contacting with modern communication and digital signal proecssing technique,This article describers The PCB circuits functions of the communication of electric power line,include amplifier,coupling,AGC system,etc.It solves the receiving and sending problem of the signal.

Key words: communication of electric power line;coupling;AGC system