Low power CMOS pass logic 4-2 compressor for high-speed multiplication

A novel CMOS 4-2 compressor using pass logic is presented in this paper. An XOR-XNOR combination gate is used to build the circuit while totally eliminating the use of inverters. The total power dissipation has been cut down to a minimum while providing the full output voltage swing at all nodes in the circuit. Furthermore, the complete circuit is implemented with a bare minimum of 28 transistors.