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Switched capacitor circuit for 1/ f noise generation using a power‐law circuit
Author(s) -
Murao Kenji,
Kohda Tohru
Publication year - 1994
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490220305
Subject(s) - switched capacitor , capacitor , offset (computer science) , logarithm , noise (video) , decoupling capacitor , physics , electronic engineering , computer science , electrical engineering , topology (electrical circuits) , control theory (sociology) , voltage , mathematics , engineering , mathematical analysis , control (management) , artificial intelligence , image (mathematics) , programming language
A simple switched capacitor (SC) circuit is given which realizes a one‐dimensional discrete dynamical system X n +1 = X n + ux z generating intermittent chaos with a 1/f‐shaped power spectrum. an integrated circuit with a pair of logarithmic and antilogarithmic amplifiters can easily realize the power‐law term x z which plays a key role in generating l/ f noise. an inevitable small offset voltage ϵ in the SC circuit governs the cut‐off frequency of 1/ f noise, and when the dynamical system is modified by introducing an effective ϵ, the ‘indirect method’ enables us to get the precise power spectrum in the modified system.