| 摘要 |
PURPOSE:To present the fault detecting system which does not define the operational not-coincidence of each arithmetic circuit as a fault according to asynchronous signals concerning the fault detecting system of the duplex arithmetic circuits. CONSTITUTION:An arithmetic stepping circuit 7 is provided to operate respective duplex arithmetic circuits 1 and 2 only for arbitrary clocks, and a means is provided to step one arithmetic circuit only for (n) clocks while stopping the operation of the other arithmetic circuit when non-coincidence is detected between the arithmetic circuits 1 and 2 or to step one arithmetic circuit only for (m)(>n) clocks while stopping the operation of the other arithmetic circuit. When coincidence is detected by operating only one or the other among the arithmetic circuits 1 and 2 by the means, the stop is canceled and when non- coincidence is detected in the both cases, it is recognized as the fault. 3,4: interruption signal/timer signal, 5: comparator circuit, 6: clock preparing circuit, I: fault, II: announcement to host device. |
