11.4 Experiments 11.4.1Experiment 1:Rectangular waveform generator (1)Connect circuit as Fig.2,R =100k,R =15k,C=0.01uF, +5V 8 4 RESET DISCH OUT Out Rb 555 6THRES CONT TRIG GND Fig.2 rectangle waveform generator (2)Fig.3 is the equivalent circuit of the circuit in Fig.2 Please tries to explain the operation process. +5V 8 R Ra T11.4 Experiments 11.4.1Experiment 1: Rectangular waveform generator (1)Connect circuit as Fig. 2， 100 , 15 , 0.01 Ra b  kR kC F     ， Fig.2 rectangle waveform generator (2)Fig.3 is the equivalent circuit of the circuit in Fig.2 .Please tries to explain the operation process