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Linear voltage-controlled oscillator circuit diagram

2016-08-15 13:43  
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Linear voltage-controlled oscillator circuit diagram
It uses ICL8038 to form a linear voltage controlled oscillator with output frequency and input voltage being proportional. In the circuit, A1 is used to improve C1 charging and discharging constant current circuit characteristics, so that the output frequency and relative input voltage have a linear relationship, A2 is the sine wave output buffer. RP1 is used to adjust the offset voltage, RP2 is used to adjust the high-frequency symmetry, RP3 is used to adjust the low-frequency symmetry, RP3 and RP4 are used to adjust the sine-wave distortion degree.