CNTFET based voltage differencing current conveyor low power and universal filter

Abstract

This paper presents carbon nanotube field effect transistor (CNTFET) implementation of voltage differencing current conveyor (VDCC). We propose new topology of multi input-single output (MISO) CNTFET VDCC universal filter using only 2 resistors and 2 capacitors. The CNTFET VDCC filter circuit can be tuned electronically only by changing transconductance value, and there is no need for component matching conditions. The proposed CNTFET VDCC filter shows 2711 times less power consumption compared to 0.18 mu m TSMC technology and around 500 times reduction in chip area. Center frequency shift between 0.33 and 2.45 MHz was observed by varying transconductance value. Besides, the quality factor of VDCC filter was improved by increasing resistor value. All simulations were performed by using SPICE simulation tools.