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Davidovich M. V. Signal to noise output ratio improvement in nonlinear amplifier under the stochastic resonance. Izvestiya VUZ. Applied Nonlinear Dynamics, 1998, vol. 6, iss. 5, pp. 43-55.

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Russian
Heading: 
Applied Problems of Nonlinear Oscillation and Wave Theory
Article type: 
Article
UDC: 
621.372

Signal to noise output ratio improvement in nonlinear amplifier under the stochastic resonance

Autors: 
Davidovich Mihail Vladimirovich, Saratov State University
Abstract: 

The numerical simulations of nonlinear four—ports under the stochastic resonance are resulted and presented. The wide—band amplification of modulated signals with the noise coefficient in the range 1.5 — 2.0 dB has been shown. The possibility of noise coefficient decreasing in the circuit with several branches having non-identical four—ports has been investigated. The block—scheme for extraction the sinusoidal signal from white noise has been introduced and investigated. The signal has the form of separated sinusoidal series with carrying frequency ω0. The peculiarities of the scheme are the subharmonic signal ω0/3 producing which is proportional to the input signal and also the nonlinear signal transformation.

Key words: 
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Acknowledgments: 
The author is grateful to Prof. V.S. Anishchenko for raising the problem investigated in this paper.
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Received: 
17.12.1997
Accepted: 
09.12.1998
Published: 
25.02.1999
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