4-Decade Square-Wave Generator

  
This circuit will generate a square wave of 2 Hz to 20 kHz. The circuit uses an op amp in a relaxation-oscil
4-Decade Square-Wave Generator - schematic

lator configuration. The output is about 15 Vpp. Rl through R4 are calibration controls for each of the four frequency ranges, as selected by SI-a and Sl-b. RIO adjusts the output level. S1 Frequency 1= 2Hz - 20Hz 2= 20Hz-200Hz 3= 200Hz - 2kHz 4= 2kHz-20kHz




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