JPS5683164A - Data transmission system - Google Patents

Abstract

PURPOSE:To apply the data receiver for a simple AC coupling to RZ signal, by transmitting the transmission data signal after converting into the code in combination with a given period of pulse and eliminating the pulse of a given period at the reception side. CONSTITUTION:The data input signal (a), t0 wide from the pulse generating circuit 6 in the transmitter T and the data input signal (b), tDA wide are processed at an OR circuit 7, and the signal converted into code is transmitted from the output interface circuit 8 to the transmission line 14. The signal from the line 14 is demodulated at the input interface circuit 9 of the receiver R, and the demodulated signal d is fed to the monostable multivibrator 11 and the delay circuit 10. Further, negative pulse signal (e), tw in width is produced at the output of the multivibrator 11 and the signal (f) delaying the signal (d) by td is produced, the signals (d) and (f) are processed at the NAND circuit 12 to output the signal (g) to remove narror pulses. Finally, the monostable multivibrator 13 is operated at the trailing of the signal (g), to output the reproduced data (h), tDA in pulse width.