Design a comparator similar to the 74x85 that uses the opposite cascading order. That is, to perform a 12-bit comparison, the cascading outputs of the high-order comparator would drive the cascading inputs of the mid-order comparator, and the mid-order outputs would drive the low-order inputs. You needn’t do a complete logic design and schematic; a truth table and an application note showing the interconnection for a 12-bit comparison are sufficient.
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