| 摘要 |
PURPOSE:To make it possible to check that there is no margin in a diagnostic program, by constituting the titled apparatus so as to obtain a non-coincidence signal when the output signal of a logical circuit is changed between two preset points. CONSTITUTION:A selection signal S is connected to selector circuits 11, 10 which, in turn select signals fromreceivers and either one of timing signals (f), (g). These signals are connected to a memory circuit 5 and either one of the output of a circuit to be diagnosed and the output of a reference logical circuit is stored in the memory circuit 5 in either one of timings of the signals (f), (g). The outputs of the memory circuits 5, 6 are inputted to a comparator circuit 7 to perform comparison operative and the result thereof is inputted to a processing part 9. The processing part 9 brings a counter circuit 13 to +1 if a coincidence signal is obtained from the comparator circuit 7 when one-time diagnostic operation is finished. The counter circuit 13 outputs carrier output as a clock correcting signal (k) after repeatedly performing said +1 operation. |
