中国物理B ›› 2014, Vol. 23 ›› Issue (5): 58201-058201.doi: 10.1088/1674-1056/23/5/058201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

A voltage-controlled chaotic oscillator based on carbon nanotube field-effect transistor for low-power embedded systems

Van Ha Nguyena, Wonkyeong Parka, Namtae Kimb, Hanjung Songa c   

  1. a Department of Nano Systems Engineering, Inje University, Gimhae 621-749, Korea;
    b Department of Electronics Engineering, Inje University, Gimhae 621-749, Korea;
    c Center for Nano Manufacturing, Inje University, Gimhae 621-749, Korea
  • 收稿日期:2013-08-03 修回日期:2013-10-24 出版日期:2014-05-15 发布日期:2014-05-15
  • 基金资助:
    Project supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Grant No. 2011-0011698).

A voltage-controlled chaotic oscillator based on carbon nanotube field-effect transistor for low-power embedded systems

Van Ha Nguyena, Wonkyeong Parka, Namtae Kimb, Hanjung Songa c   

  1. a Department of Nano Systems Engineering, Inje University, Gimhae 621-749, Korea;
    b Department of Electronics Engineering, Inje University, Gimhae 621-749, Korea;
    c Center for Nano Manufacturing, Inje University, Gimhae 621-749, Korea
  • Received:2013-08-03 Revised:2013-10-24 Online:2014-05-15 Published:2014-05-15
  • Contact: Hanjung Song E-mail:hjsong@inje.ac.kr
  • About author:82.40.Bj; 05.45.Gg; 85.35.Kt; 85.40.-e
  • Supported by:
    Project supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Grant No. 2011-0011698).

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摘要： This paper presents a compact and low-power-based discrete-time chaotic oscillator based on a carbon nanotube field-effect transistor implemented using Wong and Deng's well-known model. The chaotic circuit is composed of a nonlinear circuit that creates an adjustable chaos map, two sample and hold cells for capture and delay functions, and a voltage shifter that works as a buffer and adjusts the output voltage for feedback. The operation of the chaotic circuit is verified with the SPICE software package, which uses a supply voltage of 0.9 V at a frequency of 20 kHz. The time series, frequency spectra, transitions in phase space, sensitivity with the initial condition diagrams, and bifurcation phenomena are presented. The main advantage of this circuit is that its chaotic signal can be generated while dissipating approximately 7.8u W of power, making it suitable for embedded systems where many chaos-signal generators are required on a single chip.

关键词: chaos generator, carbon nanotube field-effect transistor, bifurcation, random noise generator

Abstract: This paper presents a compact and low-power-based discrete-time chaotic oscillator based on a carbon nanotube field-effect transistor implemented using Wong and Deng's well-known model. The chaotic circuit is composed of a nonlinear circuit that creates an adjustable chaos map, two sample and hold cells for capture and delay functions, and a voltage shifter that works as a buffer and adjusts the output voltage for feedback. The operation of the chaotic circuit is verified with the SPICE software package, which uses a supply voltage of 0.9 V at a frequency of 20 kHz. The time series, frequency spectra, transitions in phase space, sensitivity with the initial condition diagrams, and bifurcation phenomena are presented. The main advantage of this circuit is that its chaotic signal can be generated while dissipating approximately 7.8u W of power, making it suitable for embedded systems where many chaos-signal generators are required on a single chip.

Key words: chaos generator, carbon nanotube field-effect transistor, bifurcation, random noise generator

中图分类号:  (Oscillations, chaos, and bifurcations)

  • 82.40.Bj
05.45.Gg (Control of chaos, applications of chaos) 85.35.Kt (Nanotube devices) 85.40.-e (Microelectronics: LSI, VLSI, ULSI; integrated circuit fabrication technology)