Nachweiseinrichtung für die Übereinstimmung von Informationen in einem integrierten Schaltkreis

摘要

The information coherence detector operates with a memory circuit (14) having an element (15) comprising a capacitance (16) whose first terminal is connected to a logical voltage (Vss) and whose second terminal is connected to a node (X0) within a looping circuit having inverters (17,18) in series. The detector comprises an indicator circuit containing complementary information, and a circuit monitoring the complementarity of the information in order to detect and perturbation phenomena causing incoherence in the information. The indicator circuit includes at least two elements of this type (19,20), the complementarity is determined by placing a load transistor between the node in the looping circuit and a first or second logical voltage.