HIGH FREQUENCY REPRODUCER AND SELLING TIME POINT INFORMATION CONTROLLER USING SAID REPRODUCER

摘要

PURPOSE:To always transmit a high frequency signal of a stable high frequency component to an AC power line by reproducing the high frequency component of the high frequency signal attenuated by the transmission carried out via the AC power line. CONSTITUTION:When a high frequency signal transmitted through an AC power line passes through a BPF 806, a waveform shaping circuit 807 produces an ON signal of a relay 808 to turn on the relay 808. A high frequency generating part 809 produces a high frequency signal and puts this signal on an AC power supply of the AC power line to send it to the next stage in response to the ON action of the relay 808.