Design of CNTFET-based Current-mode Multi-input m:3 (4 ≤ m ≤ 7) Counters

ABSTRACT

This paper presents current-mode multi-input m:3 (4 ≤ m ≤ 7) counters based on carbon nanotube FET (CNTFET). Two different approaches are considered for these designs. In the first approach, a current mode m:3 (4 ≤ m ≤ 7) counter is achieved by means of current-mirrors in the output paths. The second proposed current-mode m:3 (4 ≤ m ≤ 7) counter is designed without requiring current-mirrors. This leads to lower number of transistors and lower power dissipation in comparison with the first approach. All of the designs are simulated using the Stanford CNTFET HSPICE model at 32 nm feature size. The results indicate that the second proposed designs are consistently faster and consume lower power than the first designs. Therefore, our PDP figure is improved by 35%, 30%, 36% and 26% as compared to those of current-mode logic (CML) counter 4:3, CML counter 5:3, CML counter 6:3 and CML counter 7:3, respectively.

KEYWORDS:

• CNTFET
• current-mode logic
• multiplier
• threshold detector

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Corrigendum

Acknowledgements

MH. B designed and simulated the proposed circuit, as part of his Master of Science thesis research. MB was the advisor in his thesis research and gave the general idea in the research and also helped in critical drafting of manuscript and presentation of the results. MM helped to simulate and advised about current mode logic designs and writing of Manuscript. MH. M helped in critical drafting of manuscript and calculation and presentation of the results.

ORCID

Mehdi Bagherizadeh http://orcid.org/0000-0001-5049-4334

Additional information

Notes on contributors

Mohammad Hassan Bagheri

Mohammad Hassan Bagheri has obtained her B.S. degree from Shahid Bahonar University in computer hardware engineering. He is also received his MS degree in computer architecture systems design from Islamic Azad University of Kerman branch. His research interests are VLSI design, Nanotechnology concerning CNFET, image processing, quantum computing and reliable digital designs. Email: [email protected]

Mehdi Bagherizadeh

Mehdi Bagherizadeh received his B.Sc. degree from Shahid Bahonar University in computer hardware engineering. He is also received M.Sc. and Ph.D degree in computer architecture from Science and Research Branch, Islamic Azad University, Tehran, Iran. He is currently an Assistant Professor in the Department of Computer Engineering, Islamic Azad University, Rafsanjan. Iran. He is working on VLSI and circuit design based on CNFET, Application Specific Instruction set Processor, and WSN, and VANET.

Mona Moradi

Mona Moradi received her B.S. and M.Sc. degrees in Hardware Engineering. She has Ph.D. degree in 2015 at Science and Research Branch of Islamic Azad University under the supervision of Prof. Keivan Navi. Her research interests include VLSI, Digital Integrated Circuits, MVL, Arithmetic Circuits, CNTFET, nano electronic, hardware security and Cryptography. She is now an assistant professor at Islamic Azad University in Roudehen Branch. Email: [email protected]

Mohammad Hossein Moaiyeri

Mohammad Hossein Moaiyeri received the Ph.D. in computer architecture from Shahid Beheshti University, Tehran, Iran in 2012. He is currently an Assistant Professor in the Faculty of Electrical Engineering of Shahid Beheshti University. His research interests mainly focus on nanoelectronic circuit design, Low-power VLSI design, VLSI implementation of MVL and fuzzy logic and mixed-signal circuits design. Email: [email protected]