Performance Comparison of High-Speed High-Order (n:2) and (n:3) CNFET-Based Compressors

Abstract

Abstract-Compressors, as one of the Processing Elements (PEs), are the fundamental building blocks for accumulating partial products during the multiplication process. In this paper various high speed high-order compressors such as 6:2 and 7:2 compressors are compared with 6:3 and 7:3 ones in terms of designs and hardware requirements. To evaluate their performance, they are analyzed and compared with respect to delay and Power-Delay Product (PDP). The comparison is accomplished using the recent implementation of Full-Adder cell design at transistor-level in Carbon Nanotube Field Effect Transistor (CNFET) technology. Simulations are carried out using Synopsys HSPICE with 32nm CNTFET technology and 0.65 supply voltage. The results of simulations demonstrate the superiority of the n:3structures in terms ofpropagation delay and powerconsumption around %41 and%8, respectively.

Tolerant and low power subtractor with 4:2 compressor and a new TG‐PTL‐float full adder cell

“…The main contribution of this research is to improve the speed of the circuit based on the reduction of the critical delay path. Also in reference [30], comprehensive comparisons were made regarding the implementations of high-order compressors, especially n:2 and n:3. The performed analysis demonstrated considerable improvements using cascaded n:3 compressors in terms of circuitry parameters compared to n:2 compressors by using FA as their main core for designing fast parallel structures like multipliers.…”