- clear all;
- clc;
- syms rbe ro gm rc re
- y11=1/rbe
- y13=0
- y31=gm
- y33=1/ro
- y12=-(y11+y13)
- y21=-(y11+y31)
- y23=-(y13+y33)
- y22=-(y21+y23)
- y32=-(y31+y33)
- Y=[y11,y12,y13;y21,y22,y23;y31,y32,y33]
- % CC
- yce=Y
- yce(2,2)=yce(2,2)+1/re
- yce(3,:)=[]
- yce(:,3)=[]
- % CB
- % yce=Y
- % yce(2,2)=yce(2,2)+1/re
- % yce(3,3)=yce(3,3)+1/rc
- % yce(1,:)=[]
- % yce(:,1)=[]
- % CE
- % yce=Y
- % yce(3,3)=yce(3,3)+1/rc
- % YY=yce
- % yce(2,:)=[]
- % yce(:,2)=[]
- Y2T=@(y) [-y(2,2)/y(2,1),-1/y(2,1);(y(1,2)*y(2,1)-y(1,1)*y(2,2))/y(2,1),-y(1,1)/y(2,1)]
- T=Y2T(yce)
- hs=1/T(1,1)
- hs=subs(hs,rbe,1500)
- hs=subs(hs,ro,50e3)
- hs=subs(hs,gm,0.5)
- hs=subs(hs,rc,10e3)
- hs=subs(hs,re,1e3)