AY(S)A V(S=-AY(S(S)+Al(S) Let Y(s=AY(s)A node admittance matrix Jn(s)=-Ay2(s)V,(s)+A/,(s) -equivalent current source vector The node voltage equation: Y,(S)Vn(s)=Jn(s) or V(s)=n (s)J,(s)AY (s)A V (s) AY (s)V (s) AI (s) n e s s T e • • • • • • • • • = − + J (s) AY (s)V (s) AI (s) n e s s • • • • • • = − + The node voltage equation: Y (s)V (s) J (s) n n n • • • = ( ) ( ) ( ) 1 or V s Y s J s n n n • • − • = ----node admittance matrix ----equivalent current source vector • • • • = T Let Yn (s) AYe (s) A