| 摘要 |
PURPOSE:To obtain a signal/electric power simultaneous transmission system which evades such a higher voltage than necessary that dielectric strength causes a problem, by providing a means of setting the crest value of transmit data to a specific value of a remotely fed voltage. CONSTITUTION:Transmit data and a gate signal (a) are supplied to a synchronizing circuit 11 and a clock generating circuit 12. The output data (c) of the synchronizing circuit 11, while modulated by a polarity inverting circuit 13 to a biphase signal format with a synchronizing component as shown in a figure (d), is converted into such two signals A and B reversing in phase each other that the crest value of the digital transmit signal is equal to the necessary voltage of DC power supply electric power to be supplied to a remote terminal. A reception side at a remote spot rectifies those two signals A and B on full-wave basis to obtain DC power supply electric power and also receives the data from the transmission side 1 through an integration circuit 21, clock discriminator 22, and signal discriminating circuit 23 to perform restoration [ to waveform (h)]. |
