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digital electronics combinational logic circuits
1. Two 4-bit comparators are cascaded to form an 8-bit comparator. The cascading inputs of the most significant 4 bits should be connected ________.
(A): A = B to a logic high, A < b and a > B to a logic low
(B): ground
(C): to the cascading inputs of the least significant 4-bit comparator
(D): to the outputs from the least significant 4-bit comparator
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