ARITHMETIC AND LOGIC UNIT

摘要

PURPOSE:To prevent the actuation of an arithmetic and logic unit as a whole even though one of plural operators has a fault by providing a fault detecting circuit and a queuing operator to the arithmetic and logic unit containing plural operators of the same type connected in series. CONSTITUTION:A fault detecting circuit 4 added newly detects the fault of an operator 1-j among those 1-1-1-N. Then a controller 5 replaces the faulty operator 1-j with a newly added queuing operator 1-N+1. Thus the actuation is not discontinued with subsequent operators. Switches 6 and 7 are cut off after the fault is repaired. Then the operators 1-j and 1-j+1 are connected by a switch 8-j to recover the actuation of a whole arithmetic device.