Signal1                                                                                                                     
                                                                                                                                           
                                             0                                                 1                                          1
                                                                                                                                           
                                                                                                                                           
               S2                                                                                                                          
                                                                                                                                           
               1                                                                                                                           
                                                                                                                                           
               0                                                                                                                           
                                                                                                                                           
                     0                                      100                                            200