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<p>Matlab program for THD calculation</p> <p><b>New page</b></p><div>&lt;pre&gt;<br /> %THD from mapping coefficients. Submeasurable Op Amp Distortion, section 3<br /> function [thd dc] = thdxi(xi, E, precision);<br /> mp.Digits(precision); %Advanpix MCT<br /> Nh = numel(xi);<br /> two = mp('2');<br /> harmonic = zeros(Nh+1,1,'mp');<br /> for n = 1:Nh<br /> tn = xi(n)*E^n/two^n;<br /> for ell = 0:n<br /> tell = tn*nchoosek(mp(n), mp(ell));<br /> idx = abs(n - 2*ell) + 1;<br /> harmonic(idx) = harmonic(idx) + tell;<br /> end<br /> end<br /> thd = sum(harmonic(3:end).^2)/harmonic(2)^2;<br /> dc = harmonic(1);<br /> end<br /> &lt;/pre&gt;</div>

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