function [ C3 ] = ffelso( UT, IC0, Rc, Rg, Rt, Rbe, RE1, ff, B)
Rtv=RePlus(Rc,Rt);
Rgvv=RePlus(Rg,Rbe);
alfa=B/(B+1);
rE=UT/IC0;

Re=Rtv+Rgvv*(1+(alfa/(rE+RE1)*Rtv));

C3=1/(2*pi*ff*Re);

disp(['C3= ', num2str(C3)]);

end