A low-power biologically-inspired chaotic oscillator with process and temperature tolerance

Authors:
Vinaya Lal Shrestha;Qingyun Ma;Mohammad Rafiqul Haider;Yehia Massoud
Affiliations:
Department of Electrical and Computer Engineering, The University of Alabama at Birmingham, Birmingham, USA 35294-4551;Department of Electrical and Computer Engineering, The University of Alabama at Birmingham, Birmingham, USA 35294-4551;Department of Electrical and Computer Engineering, The University of Alabama at Birmingham, Birmingham, USA 35294-4551;Department of Electrical and Computer Engineering, The University of Alabama at Birmingham, Birmingham, USA 35294-4551
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2013

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Abstract

This paper presents a low-power, biologically-inspired silicon neuron based implementation of a chaotic oscillator circuit. The silicon neuron structure is based on Hodgkin---Huxley neuron model. Subthreshold MOSFET and current reuse techniques have been utilized to achieve a low-power consumption of 180.30 nW for the room temperature (27 °C) and typical process corner. The chaotic behavior of the circuit is confirmed by calculating the largest Lyapunov exponent. A sensitivity analysis of the proposed chaotic oscillator shows that the circuit maintains the chaotic behavior for five different process corners within the temperature range of 0---60 °C.