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

doi:10.1088/1674-1056/23/5/058201

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.

Keywords: chaos generator carbon nanotube field-effect transistor bifurcation random noise generator

Received: 03 August 2013
Revised: 24 October 2013
Accepted manuscript online:

PACS:	82.40.Bj	(Oscillations, chaos, and bifurcations)
	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)

Fund: 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).

Corresponding Authors: Hanjung Song
E-mail: hjsong@inje.ac.kr

About author: 82.40.Bj; 05.45.Gg; 85.35.Kt; 85.40.-e

Cite this article:

Van Ha Nguyen, Wonkyeong Park, Namtae Kim, Hanjung Song A voltage-controlled chaotic oscillator based on carbon nanotube field-effect transistor for low-power embedded systems 2014 Chin. Phys. B 23 058201

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

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