Inverter-based, low-power and low-voltage, new mixed-mode Gm-C filter in subthreshold CNTFET technology

• Published in: IET circuits, devices & systems Vol. 12; no. 6; pp. 681 - 688
• Main Authors: Zanjani, Sayed Mohammad Ali, Dousti, Massoud, Dolatshahi, Mehdi
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 01.11.2018; John Wiley & Sons, Inc
• Subjects: Carbon; carbon nanotube field effect transistors; carbon nanotube field-effect transistor technology; Carbon nanotubes; CMOS; current modes; Design; Electric potential; field effect transistor circuits; filters; frequency 100.0 MHz; grounded capacitors; Harmonic distortion; HSPICE simulation; Integrated circuits; inverter-based new mixed-mode universal Gm-C filter; Inverters; invertors; low-power electronics; low-power new mixed-mode universal Gm-C filter; low-voltage new mixed-mode universal Gm-C filter; Noise levels; Operational amplifiers; operational transconductance amplifiers; power 11.66 muW; power consumption; Semiconductors; simultaneous filtering outputs; Special Issue: Low Voltage Low Power Integrated Circuits and Systems; subthreshold CNTFET technology; subthreshold transistors; total harmonic distortion; Transconductance; Transistors; Voltage; low-voltage new mixed-mode universal Gm-C filter; current modes; carbon nanotube field-effect transistor technology; field effect transistor circuits; subthreshold transistors; grounded capacitors; HSPICE simulation; carbon nanotube field effect transistors; harmonic distortion; low-power new mixed-mode universal Gm-C filter; filters; subthreshold CNTFET technology; power consumption; power 11.66 muW; frequency 100.0 MHz; invertors; inverter-based new mixed-mode universal Gm-C filter; operational transconductance amplifiers; operational amplifiers; total harmonic distortion; low-power electronics; simultaneous filtering outputs
• ISSN: 1751-858X; 1751-8598; 1751-8598
• DOI: 10.1049/iet-cds.2018.5158

This study presents a new low-voltage and low-power, mixed-mode, universal Gm-C filter capable of generating simultaneous filtering outputs. The proposed circuit employs only 19 inverters as operational transconductance amplifiers, and 2 grounded capacitors in carbon nanotube field-effect transistor (CNTFET) technology. However, due to the proper use of subthreshold transistors biased at ±0.25 V supply, the power consumption of the proposed circuit is reduced effectively. Furthermore, as the HSPICE simulation results show, the proposed filter consumes only 11.66 µW of power, while its total harmonic distortion is obtained −55.4 dB at 100 MHz centre frequency. Moreover, the input referred noise values at 100 MHz are reduced to 11.57 nV/$\sqrt {{\rm Hz}} $Hz and 760 fA$\sqrt {{\rm Hz}} $Hz in voltage and current modes, respectively.