| 摘要 |
PURPOSE:To enable to keep the transmission quality without distortion, by multiplex transmission of two types of DC voltage values or DC current values in time sharing. CONSTITUTION:The DC voltage or current X1, X2 are converted into the pulse wave (a) of pulse width T1=A1X1, T2=A2X2 by the DC-pulse width converter 1 and they are transmitted via the tranmission line L as the optical pulse (b) by the electrooptic converter 2. At the reception section, it is converted into electric signal at the photoelectric converter 3, and as to the pulse T1, the waveform (c) is obtained at the pulse width-peak value converter 5 and the DC signal V01 is obtained at the hold circuit 7. Further, as to the pulse T2, the waveform (e) is obtained at the phase inversion circuit 4, and waveform (f) is obtained at the pulse width- peak value converter 6, and DC signal V02 is obtained at the hold circuit 8. |
