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LABORATORY EXPERIMENTS  769
                                                                                    +9 V
                                                                                  –
                         V s                                                                    V o
                                                                                  +
                                        2                                           –9 V
                                                   –              V i
                                                   +                                R
                                                                         R           f
                                                                          i
                              V ref
                                                                                                    V s

                                                                                           V sensor




                             FIGURE 11.15: Noninverting Schmitt trigger circuit.




















































                             FIGURE 11.16: Noninverting Schmitt trigger lab setup.
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