| 摘要 |
PURPOSE:To simplify the circuit constitution by constituting the circuit with a transmission section having a parallel serial conversion circuit, a polarity inverting circuit and a polarity inverting/noninverting circuit and a reception section having a serial parallel conversion circuit and an exclusive OR circuit. CONSTITUTION:A polarity inverting circuit 2 inverts the polarity of a specific bit in an input m-bit parallel signal 6, a polarity inverting/noninverting circuit 3 applies inverting/noninverting control for the one specific bit by using an input auxiliary signal 7, a parallel serial conversion circuit 1 receives a signal in (m-1)-bit except the one specific bit in the input m-bit parallel signal 6, the polarity inverting circuit 2 and an output of the polarity inverting noninverting circuit 3 and converts them into a serial signal 8. The serial parallel conversion circuit 4 receives an input serial signal 9, outputs an output m-bit parallel signal 10 and a c-bit, an exclusive OR circuit 5 receives the one specific bit in the output m-bit parallel signal 10 and the c-bit and outputs an output auxiliary signal 11. Thus, the auxiliary signal is superimposed on the main signal with simple circuit constitution. |
