MARGINLESS DETERMINATION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To operate electronic equipment which monitors presence of margin regardless of circumferential conditions without changing the frequency of a clock signal up to marginal conditions.

SOLUTION: This marginal determination circuit comprises: a means 1 for storing data to be determined, a means 2 for delaying the data; a means 3 for storing the output of the means 2; and a means 4 for comparing the stored contents of the means 1 and the stored contents of the means 3 and outputting a marginless detection signal when both differ. The marginless detection signal output by the means 4 is used as a switching control signal for a clock switch circuit.

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