| 摘要 |
PROBLEM TO BE SOLVED: To provide a distribution line carrier signal reception circuit adopting a single phase inter-line injection method by which miniaturization is attained without increasing number of circuit of a receiver side and no restriction is caused between phase relation between transmission and reception. SOLUTION: A transmitter side injects a carrier signal between lines among three-phase distribution lines L, a receiver side receives a reception signal between two phases among the three-phase distribution lines L, detects the received signal, separates and detects the carrier signal from the detected reception signal in this distribution line carrier signal reception circuit. In this case, a phase of a reception signal (SW) in the detected two-phase respectively signal is delayed by 60 degrees and the delayed signal is added to the reception signal (SU) of the other phase so as to synthesize the reception signal.
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