| 摘要 |
PURPOSE:To avoid the output of wrong information to the outside by providing an output information correct/wrong deciding circuit to detect the fault of its own circuit. CONSTITUTION:Information X is converted into output information X1, X2... by a data converting part L and then into output information X1', X2'... by an external interface part M. These pieces of converted information are outputted to the outside through a separating circuit N as long as an output circuit is working normally. A correct/wrong deciding circuit P compares the information X with the information X1', X2'... and transmits a separating signal Z to the circuit N to stop the external output of the information X1', X2'... in case an error is detected. At the same time, the circuit P transmits the signal Z in case the information X is not received and produces tentative information Y independently of the outside. Thus the circuit P checks the internal working of the output circuit based on the information Y. As a result, the output of the wrong information can be prevented. |
