Low-power low-voltage 4-2 compressors for VLSI applications

This paper presents new 4-2 compressor architectures, a Suit-swing Bipolar Double Pass-Transistor 4-2 compressor, a new Suit-swing BiNMOS 4-2 compressor, a reduced-swing Bipolar Double Pass-Transistor 4-2 compressor and a reduced-swing Double Pass-Transistor BiNMOS 4-2 compressor, that outperform a standard CMOS 4-2 compressor up to 3 times in power-efficiency at supply voltages 1.5V-3V. The Bipolar Double Pass Transistor 4-2 compressor is more power-efficient than a standard CMOS 4-2 compressor even at a fanout of 1. All remaining proposed 4-2 compressors have a lower crossover capacitance with a standard CMOS 4-2 compressor than previously reported low-power 4-2 compressors. Circuits were designed and fabricated in 0.8 mu m BICMOS technology.