8038 function generator circuit

Published:2011-7-19 22:19:00 Author:John | Keyword: function generator | From:SeekIC

The figure shows the 8038 function generator circuit. Function generator formed by integrated circuit chip 8038 can obtain square wave, triangle wave and sine wave at the same time. Triangle wave can be generated directly by the capacitor discharge current. And square wave can be obtained by control signal. The sine wave is obtained by the broken line approximation circuit from the triangle wave. The sine curve obtained in this way is not a smooth line, whose distortion was about 1 percent. The needs for general purpose can be met. PR1 in the potentiometer circuit is used to adjust the frequency to be ranged from 20 Hz to 20 kHz. PR2 is used to adjust the waveform’s distortion and PR3 is used to adjust the waveform's duty cycle.

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