An Ultra High-Speed (4; 2) Compressor with a New Design Approach for Nanotechnology Based on the Multi-Input Majority Function

Implementation of new nanotechnologies needs new design methodologies as there are different approaches to achieve logic functions with these technologies. In this paper a new nanotechnology design approach is proposed. This approach is based on using multi-input majority function as a threshold logic gate. The proposed approach is used to illustrate a general form for the multiinputs logic gates (AND, OR, NAND, and NOR). The (4; 2) compressor as a multi-input multi-output circuit and the carbon nano tube field effect transistor are employed as example circuit and example nanotechnology respectively to demonstrate the new approach. Two versions of transistor level design are presented for the proposed gate level design in the voltage and current modes. Simulation results show good improvement in the number of gate levels and the number of transistors (in another word the circuit area). In addition, in the current mode version of the (4; 2) compressor a significant improvement in the speed of 84% is achieved.