| 摘要 |
PURPOSE:To precisely restore a transmission pulse which is pulse width- modulated in a reception side by providing a flip flop which detects the edge of the transmitted transmission pulse and which executes a signal inversion processing in synchronizing with the edge detection. CONSTITUTION:When a transmission pulse signal (a) is inputted to a transmission port, a part of it is delayed by an integrating circuit, is turned into a delay signal (c), and is outputted to a Schmitt gate 4. The delay signal (c) is outputted to an exclusive OR gate 3 and an edge pulse signal (d) showing the front edge (leading edge) position and the end edge (trailing edge) of the transmission pulse signal (a) is generated, whereby it is transmitted from a transmission transistor 7 to a pulse transformer 8. The signals transmitted to the pulse transformer 8 are transmitted by a pulse signal from a transmission line 9, and it turns on and off a reception transistor 13. A restored edge pulse signal (e) obtained by inverting the edge pulse signal (d) is generated on the side of the collector of the transistor 13, and the flip flop 14 executes the inversion signal processing in synchronizing with the signal (e). The signal is outputted to a reception port from an output Q as a restored pulse signal (f). |
