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A high performance CNFET-based operational transconductance amplifier and its applications

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Abstract

High performance electronic systems face several challenges in driving innovative integrated circuits when the internal transistors are scaled down below 45 nm. Carbon nanotube field effect transistors (CNFETs) are considered as excellent candidates for building energy-efficient electronic systems in the near future, due to their unique characteristics such as ballistic transport, scalability, and better channel electrostatics. In this paper, a new high performance operational transconductance amplifier (OTA) based on 32 nm CNFET devices is presented. The proposed OTA maintains a highly linear wide continuous tuning range and a wide frequency response range, enabled by splitting the linear voltage-to-current conversion and tuning two different blocks. As an application, a universal second-order transconductance-capacitor (G m  − C) filter realized using the OTA is introduced. Simulation results show that the CNFET-based OTA offers very a low current consumption of 2.35 μA from a ± 0.9 V power supply, achieves a bandwidth of 9.5 MHz, and has an input dynamic range of ± 0.2 V.

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Acknowledgements

This work was supported by the Natural Science Foundation of China (No. 61361011), the Natural Science Foundation of Guangxi (No. 2014jjAA70058), and the Project of Outstanding Young Teachers’ Training in Higher Education Institutions of Guangxi (No. GXQG022014002).

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Authors and Affiliations

  1. College of Electronic Engineering, Guangxi Normal University, Guilin, China

    Mingcan Cen, Shuxiang Song & Chaobo Cai

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  1. Mingcan Cen
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  2. Shuxiang Song
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  3. Chaobo Cai
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Correspondence to Shuxiang Song.

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Cen, M., Song, S. & Cai, C. A high performance CNFET-based operational transconductance amplifier and its applications. Analog Integr Circ Sig Process 91, 463–472 (2017). https://doi.org/10.1007/s10470-017-0951-1

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