DocumentCode
962695
Title
Fast State-Space Harmonic-Distortion Estimation in Weakly Nonlinear Gm−C Filters
Author
Sotiriadis, Paul P. ; Çelik, Abdullah ; Loizos, Dimitrios ; Zhang, Zhaonian
Author_Institution
Dept. of Electr. Eng., Johns Hopkins Univ., Baltimore, MD
Volume
54
Issue
1
fYear
2007
Firstpage
218
Lastpage
228
Abstract
A fast, one-pass harmonic-distortion estimation algorithm for G m-C filters is introduced. It is derived using state-space modeling and can be applied directly to Gm-C filters, of any order, with MOS transconductors exhibiting any type of weak nonlinearity. The algorithm is formed out of a small number of explicit expressions involving the filter´s structural matrices and the transconductors´ nonlinearity. It can be easily implemented in MATLAB. For verification of the theoretical development, the algorithm was used to derive the harmonic distortion of a single-ended Gm-C filter with weakly nonlinear transconductors designed on a 0.5-mum technology. The results of the algorithm and CADENCE simulation were found to be in good agreement
Keywords
harmonic distortion; nonlinear filters; state-space methods; 0.5 micron; MOS transconductors; continuous-time filter; fast state-space harmonic-distortion estimation; state-space modeling; weakly nonlinear Gm-C filters; Dynamic range; Frequency; Harmonic distortion; Impedance; MATLAB; Mathematical model; Nonlinear filters; Power harmonic filters; State estimation; Transconductors; Continuous-time filter; distortion; fast algorithm; filter; harmonic distortion; nonlinearity; perturbation; state space;
fLanguage
English
Journal_Title
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher
ieee
ISSN
1549-8328
Type
jour
DOI
10.1109/TCSI.2006.887458
Filename
4061030
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