Collector
                  Substrate                                                                         CBCO                                              
                                                                                                                                                       *

                                                                                R                                                             Rcx
                                                                                s
                                                                *l                        Qbcp
                                                              Mbcp
                                                                                                R          q
                                                                                                  BIP/ bp
                                                                *                    *                          *                                      *
                                                  l                   M
                                                       ccp                 l              Q                                                   Rci
                                                                * bep                          bep
                                                                                                                                         *             *
                                                                                                                Qbcx      Qbc M l -l
                                                                                                                                              bc gc
                                      R                                                    R          q
                                         bx                                                    bi / b
                     Base  *                                   *                    *                          *        *               *              
                                                                                                                              Q
                                                                                     M                                             be
                                                                                          lbex                                           M l                l
                                                       Q                                                                                        be               cc
                                                         bex                         *                                   *               *             *


                                                                                                     CBEO                                       Re *
                                                                                                                                                       
                                                                                                                                                     Emitter