Transceiver circuit diagram of single-channel power line communication

This circuit is a single-channel power line communication transceiver application circuit. It uses the mains 380V or 220V low-voltage power lines to transmit analog and digital signals for wired communication. Figure (a) is a single-channel power line carrier transmitting circuit, and its core component ICl is the audio phase-locked loop integrated circuit LM567; Figure (b) is a single-channel power line carrier receiving circuit.