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Research and Advances

Information transfer and area-time tradeoffs for VLSI multiplication

The need to transfer information between processing elements can be a major factor in determining the performance of a VLSI circuit. We show that communication considerations alone dictate that any VLSI design for computing the 2n-bit product of two n-bit integers must satisfy the constraint AT2 ≥ n2/64 where A is the area of the chip and T is the time required to perform the computation. This same tradeoff applies to circuits which can shift n-bit words through n different positions.

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