sine wave generator circuit

[shahbaz.ele]

dear all
i need to generate a sine wave of any freq and amp.
i found many circuits on internet but i want anyone to share practical circuit.
if someone tried it earlier please share.
thanks in advance.

- - - Updated - - -

I think I should say oscillator rather generator.
I need opamp based sine wave oscillator circuit.

 

[Jestin_cubetech]

function generator circuit

 

[tpetar]

ICL8038 Waveform Generator (obsolete)
Everything You Always Wanted to Know About the ICL8038
https://www.mit.edu/~6.331/icl8038data.pdf


AN-263 Sine Wave Generation Techniques - TI Application Report
**broken link removed**


Sine Wave Generation Techniques - National Semiconductor Application Note 263
**broken link removed**