# Loads the values of Zin, Zout, and fT
# Calculates the small-signal circuit parameters

matlabload('nmos_Zin');

Cgg = -1/imag(Zin)/(2*pi*f);

matlabload('nmos_Zout');

Yout = 1/Zout;

gd = real(Yout);
plot(f*1e-6,gd,'freq (MHz)','gd (A/V)','','log10x');

Cgd = imag(Yout)/(2*pi*f);
plot(f/1e6,Cgd*1e12,'freq (MHz)','Cgd (pF)','','log10x');
Cgs = Cgg - Cgd;
plot(f*1e-6,Cgs*1e12,'freq (MHz)','Cgs (pF)','','log10x');

matlabload('nmos_fT');

kern = length(fT);
fT = fT(kern);
gm = fT*2*pi*Cgg;
plot(f*1e-6,gm,'freq (MHz)','gm (A/V)','','log10x');