Function generator Rectangular wave generator Experimental content: 1. Rectangular wave generating circuit Rectangular wave frequency: f=12RCln (1+2R2R3) (1) Observe the output waveform The output waveform is a rectangular wave. (2) Change R or C Observe the change of the output waveform When R or C increases, the rectangular wave frequency decreases; when R or C decreases, the rectangular wave frequency increases. Simulation experiment demonstration 2. Duty cycle adjustable rectangular wave generating circuit Change the position of the variable resistor Rw and observe the change of the rectangular wave. Sawtooth wave generator When the upper half of Rw = the lower half of Rw, the charging time constant = the discharging time constant, and the output is a triangular wave; When the upper half of Rw >> the lower half of Rw, the charging time constant >> the discharging time constant, and the output is a negative sawtooth wave; When the upper half of Rw
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