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TOPIC 3: ASTABLE MODE



                       FORMULA FOR GENERATING


                                          DELAY TIME






                           TIME HIGH, TH




                              Output of the astable circuit is high during the

                              charge time, TH:

                                               TH = 0.693(RA + RB) C











                           TIME LOW, TL




                             The output is low during the discharge time, TL:


                                                  TL = 0.693(RB) C














                           DUTY CYCLE, D





                              The ratio of RA and RB precisely sets the duty

                              cycle, D:

                                                  D=  TH/(TH+TL )













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