add pnp smallsignal

09_bjt_small_signal.tex

@@ -8,11 +8,23 @@
         to [short] ++(2,0)
         to [R,l=$r_{o}$] ++(0,-2)
         to [short] ++(-2,0)
-        to [short,i=$i_e$,-*] ++(0,-1)node[below]{E}
+        to [short,i=$i_e$,-o] ++(0,-1)node[below]{E}
         ++(2,3)
-        to [short,i<=$i_c$,-*] ++(1,0)  node[right]{C};
+        to [short,i<=$i_c$,-o] ++(1,0)  node[right]{C};
         % to [open,v_=$v_{ce}$] ++(0,-2);
     \end{circuitikz}
+    \begin{circuitikz}
+        \draw (0,0) node[above] {E}
+        to [short,o-*,i=$i_e$] ++(0,-1)
+        to [cI,l=$g_m v_{eb}$,i=$$] ++(0,-2)
+        to [short,-*] ++(2,0)
+        to [short,-o,i=$i_c$]++(1,0) node[right]{C}
+        ++(-1,0) to[R,l_=$r_{o}$] ++(0,2)
+        to [short] ++(-4,0)
+        to [R,l=$r{be}$,v=$v_{be}$] ++(0,-2)
+        to [short,i=$i_b$,-o] ++(-1,0)node[left]{B}
+        ;
+    \end{circuitikz}
 \end{center}
 
 \subsection{Transistor amplifiers, 2 step analysis}