# simple audio (sine wave) oscillator

Discussion in 'The Projects Forum' started by ThyratronTube125, Mar 13, 2012.

1. ### ThyratronTube125 Thread Starter New Member

Feb 7, 2012
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Can someone provide an easy sine wave (audio) oscillator that doesn't need too many parts? (i.e. phase shift oscillator)

Also, can a Colpitts/Armstrong/Clapp circuit be used to generate audio tones? (Those above mentioned are usually used with RF circuits).

2. ### wayneh Expert

Sep 9, 2010
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4,394
Use the FreqGen app on your iPod. It'll give you sine, square or triangle waves over the full audio spectrum.

Probably not what you were looking for, but you haven't explained why that wouldn't work.

3. ### Obi_Kwiet New Member

Apr 4, 2011
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Are you looking for an IC?

May 11, 2009
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Aug 21, 2008
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6. ### crutschow Expert

Mar 14, 2008
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You could use an XR2206 function generator chip. It will generate sine, triangle, and square-waves. The sine-wave does have a small amount of distortion so it's not suitable for high quality audio distortion measurements, if that's what you need.

Jun 23, 2011
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8. ### Veracohr Well-Known Member

Jan 3, 2011
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If you just need a single frequency, try a Wien bridge oscillator:

$\frac {Rf}{Rg} = 3
f= \frac 1{2 \pi RC}$

9. ### Audioguru AAC Fanatic!

Dec 20, 2007
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The circuit you posted is extremely simple. It has nothing to control its output level. Its output will rise until the opamp is badly clipping with lots of distortion.

10. ### bountyhunter Well-Known Member

Sep 7, 2009
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Exar XR-2206. I built a benchtop signal generator using it.