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It has been demonstrated that, in a 64-b carry look-ahead adder, the use of conventional half-micron BiCMOS circuits under a 3.6-V power supply gives 40% faster delay than the CMOS design. Up to 85% improvement is obtained with the new multiemitter BiCMOS circuit. A complete logic circuit family with the multiemitter concept is described, showing a maximum benefit on gates with a high number of inputs
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