| 摘要 |
PURPOSE:To eliminate the delay in a detection time with good S/N by making a pulse signal generated in the timing of the leading edge of the 1st pulse signal and the pulse signal generated in the timing of the trailing ridge of the 2nd pulse signal opposite in polarity to that of the preceding pulse signal. CONSTITUTION:A transmitter Tx generates a pulse signal narrow in pulse width respectively in the leading and trail edges as to a signal As wide in pulse width and multiplexes it with an inputted signal Bs narrow in pulse width. In this case, the pulse signal generated at the loading edge of the signal As is made to the same polarity as that of the preceding pulse signal via OR circuits O1, O2 and the pulse signal generated at the trailing edge of the signal As and the signal B are made opposite in the polarity to that of the signal just before via the OR circuit O1 and an FFFF1. These signals are transmitted to a transmission line L via AND circuits A3, A4 and a transformer T1. Further, the original signals are reproduced at the receiving side by an almost reversed method. |
