| 摘要 |
PURPOSE:To provide the noise transmission preventing device for the digital signal which can evade the transmission of variation in level accompanying fluctuations of a signal potential or a signal on another signal line as a signal of data when the digital signal is transmitted. CONSTITUTION:A signal D having a potential showing data to be transmitted originally as one binary data and a signal DB having a potential showing the other data are transmitted at the same time and both the signals D and DB are inputted on the side of an input block 10; and a noise transmission preventing circuit 11 judges a normal state and employs one signal D as an input signal when they have potentials showing mutually different data '1' and '0', but decides an abnormal state and continues to output a signal outputted so far as the input signal as it is when both the signals have potentials indicating the same data. |
