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diff --git a/CTB/readme.txt b/CTB/readme.txt new file mode 100644 index 0000000..8b8cef9 --- /dev/null +++ b/CTB/readme.txt @@ -0,0 +1,29 @@ +Circuit Toolbox for Matlab/Octave +--------------------------------- + +Small collection of useful functions to convert n-port network parameter +such as scattering parameter, Z- or Y-parameter. + +Read/Write to touchstone file format to read with Qucs: http://qucs.sourceforge.net + +--- +Examples: +addpath('path/to/CTB'); +% create ABCD matrix of a series C, shunt R and shunt L +f = linspace(0,1e9,201); % frequency vector +a = a_series(1./(2j*pi*f*10e-12)); % create ABCD matrix for a series capacity of 10pF +a = a_mul(a, a_shunt(1/50*ones(size(f)))); % append a 50 Ohms shunt resistance +a = a_mul(a, a_series(2j*pi*f*20e-9)); % append a 20nH series inductance +s = a2s(a); % convert to s-parameter + +figure +plot(f,20*log10(squeeze(abs(s(1,1,:))))); +hold on; +grid on; +plot(f,20*log10(squeeze(abs(s(2,1,:)))),'r--'); +ylim([-20 0]); +legend('s11','s21'); + +--- +Copyright (c) 2006-2013 Sebastian Held, Thorsten Liebig. +All rights reserved. |