REMOTE DATA TRANSRECEPTION CIRCUIT

摘要

The circuit for using two data lines against a number of switches connected with a host computer in computer network comprises a transmitting part (A) and a receiving part (B). The transmitting part (A) includes a multiplexer (MUX) for selecting one switch out of a number of switches (SW) and a inverse line driver (LDR) for providing signals of ± 12V to the receiving part (B). The receiving part (B) includes a serial/parallel shift register (SR) for converting input serial data to parallel one with pulse signal of a single stable multivibrator (MMV), a counter (COUNT2) for receiving datas of (SW) and providing a clock signal to a latch (LAT) through a NOR gate (NO1), and a decoder (DEC).