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Nonlinear switched-current CMOS IC for random signal generation

Nonlinear switched-current CMOS IC for random signal generation

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© The Institution of Electrical Engineers
Published

A nonlinear switched-current circuit is presented that implements a chaotic algorithm for the generation of broadband, white analogue noise. The circuit has been fabricated in a double-metal, single-poly 1.6μm CMOS technology and uses a novel, highly accurate CMOS circuit strategy to realise piecewise-linear characteristics in the current-mode domain. Measurements from the silicon prototype show a flat spectrum from DC to ∼30% of the clock frequency, for a clock frequency of 500kHz.

Inspec keywords: signal generators; CMOS integrated circuits; switched networks; white noise; piecewise-linear techniques

Other keywords: CMOS circuit strategy; 500 kHz; piecewise-linear characteristics; 1.6 mum; nonlinear switched-current CMOS IC; broadband white analogue noise; silicon prototype; double-metal single-poly 1.6μm CMOS technology; random signal generation; current-mode domain; clock frequency; chaotic algorithm

Subjects: Nonlinear network analysis and design; CMOS integrated circuits; Time varying and switched networks; Signal generators

References

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      • Oppenheim, A.V., Wornell, G.W., Isabelle, S.H., Cuomo, K.M.: `Signal processing in the context of chaotic signals', Proc. 1992 Int. Conf. on Acoustics, Speech and Signal Processing IV, 1992, p. 117–120.
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      • A.R. Murch , R.H.T. Bates . Colored noise generation through deterministic chaos. IEEE Trans. , 608 - 613
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      • A. Rodriguez-Vázquez , M. Delgado-Restituto . Switched capacitor broadband noise generator for CMOS VLSI. Electron. Lett. , 1913 - 1915
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      • K. Aihara , T. Takabe , M. Toyoda . Chaotic neural networks. Phys. Lett. A , 333 - 340
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