Carbon Nanotube Field Effect Transistors Based Digitally Reconfigurable Single Differential Voltage Current Conveyor based Analog Biquadratic Multifunctional Filter at 32nm Technology Node

Abstract

Carbon Nanotube Field Effect Transistors (CNFET) are considered to be the potential candidates for overcoming the shortcomings associated with the scale of the art CMOS transistors; as the scaling continues. In this paper a digitally reconfigurable CNFET based biquadratic multifunctional filter employing a CNFET based single Differential Voltage Current Conveyor (DVCC) at 32nm technology node has been presented. The circuit utilizes a single CNFET based DVCC block along with the arrangement of few resistors and capacitors. The proposed digitally reconfigurable multifunctional filter circuit is able to obtain programmable low pass, high pass and band pass filter configurations using the same topology. The designed CNFET based multifunctional filter obtains a resonant frequency of the order of GHz. Furthermore, a 3-bit digital control of the designed multifunctional filter parameters i.e. Quality Factor (Qo) & resonant frequency has been made possible using the Current Summing Network (CSN). Sensitivity and comparative analysis has also been performed. The circuit has been simulated at a low voltage supply of 0.9V using HSPICE environment at 32nm technology node. The simulation results obtained are in sync with the theoretical analysis