5Hz ~ 5MHz function generator composed of MAX038

Published:2011/4/18 20:17:00 Author:Ecco | Keyword: 5Hz ~ 5MHz , function generator | From:SeekIC

The 5Hz ~ 5MHz function generator circuit is shown in the chart. The circuit is a 5Hz ~ 5MHz function generator circuit, which could output the square wave, sine wave and triangular wave according to the need. The integrated circuit MAX038 is a special function generator which sets the oscillation frequency by the current of the input current terminal IIN. It changes the reference voltage into current by a resistor, the current flowing the end of FADJ is used to adjust the frequency. The frequency range of the circuit is set as multiples of 10. The timing capacitor is changed in the range of 75pF ~ 10μF. As the wire connection has an effect on working capacitor when the frequency is 5MHz, it could increase a CTc variable condenser in 50pF connecting to 75pF working capacitor in parallel, and it is easy to correct the high frequency. Frequency setting potentiometer PR1 adopts a resistor with 10 laps. The circuit is characterized by simple structure, adjustable components, reliable working.



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