Function generator circuit composed of the ICL8038

Published:2011/8/24 20:49:00 Author:Christina | Keyword: Function, generator | From:SeekIC

The function generator circuit which is composed of the ICL8038 is as shown in the figure. The ICL8038 is composed of the charging and discharging current source, the comparator, the bridge and the broken line approximation circuit. This circuit can be used as the operating mode of the voltage-controlled oscillator, we add the A1 to improve the linearity of the control voltage. The oscillation frequency is decided by the control voltage (the output voltage of RP1), the resistance value of RP2, the R1, R2 and R3. The output impedance of ICL8038 is decided by the R3, when there is the triangular wave, the resistance value is 200Ω. Because the waveform distortion is large, so it can not output the sine wave in the high impedance state, so we add the buffer amplifier A2.



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