Symbolsk løsning av nodeligninger med Matlab: Difference between revisions
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% Using Kirchoff's current law (KCL) on a source follower configuration | % Using Kirchoff's current law (KCL) on a source follower configuration | ||
% to find Vout as a function of Vin | % to find Vout as a function of Vin | ||
% Kjetil Ullaland | % Kjetil Ullaland | ||
ligning1='(Vout-Vgs)/Zc+gm*Vgs+Vout/Rl=0'; | ligning1='(Vout-Vgs)/Zc+gm*Vgs+Vout/Rl=0'; | ||
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disp('Solve for Vgs'); | |||
vgs_solved=solve(ligning2,'Vgs'); | |||
ligning3=subs(ligning1, | pretty(simplify(vgs_solved)); | ||
Vout_solved= | |||
pretty(Vout_solved) | disp('Solve for Vout(vin)'); | ||
ligning3=subs(ligning1,vgs_solved,'Vgs'); | |||
Vout_solved=solve(ligning3,'Vout'); | |||
pretty(simplify(Vout_solved)) | |||
</pre> | </pre> | ||
Revision as of 08:13, 9 September 2014
% Using Kirchoff's current law (KCL) on a source follower configuration
% to find Vout as a function of Vin
% Kjetil Ullaland
ligning1='(Vout-Vgs)/Zc+gm*Vgs+Vout/Rl=0';
ligning2='(Vgs-Vout)/Zc+(Vgs-Vin)/Rs=0';
ligning1=subs(ligning1,'1/(j*w*C)','Zc');
ligning2=subs(ligning2,'1/(j*w*C)','Zc');
pretty(ligning1);
pretty(ligning2);
disp('Solve for Vgs');
vgs_solved=solve(ligning2,'Vgs');
pretty(simplify(vgs_solved));
disp('Solve for Vout(vin)');
ligning3=subs(ligning1,vgs_solved,'Vgs');
Vout_solved=solve(ligning3,'Vout');
pretty(simplify(Vout_solved))
