A shared-well dual-supply-voltage 64-bit ALU

A shared N-well, dual-supply-voltage 64b ALU module in 0.18/spl mu/m, 1.8V 1P 5M CMOS technology operates at 1.16GHz on a 9mm/sup 2/ die. For a target delay increase of 2.8%, energy savings are 25.3% using dual supplies. An 8.3% increase in delay, saves 33.3% in energy.