I need recommendations on the following:

I am trying to build a function generator that generates sine wave. Some one told me I can use a vibrator or timer IC to implement it. I have no idea on what to use. I need it to give frequency in the range of 20KHz to 500KHz. Also I need to be able construct it fast.

 

You might look at the Exar XR2206 function generator IC. I will go byond
500khz

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National Semiconductor application note LB-16 has a circuit of an easily tuned sinewave oscillator, but you would need to use a wider bandwidth op amp to reach 500kHz. Go to www.nsc.com and search for LB-16 or AN-20 or AN-31. There is also an IC that will generate sine, square or triangle waves, but I don't have the number at hand.

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hi,

if you need the circuit for the XR2206 just email me, am using that circuit now. :wink:

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ICL8038 also can work. Or the new version:MAX038

 

Check also this:

Function Generator with the MAX038
http://www.electronics-lab.com/proje...009/index.html