generating pure sinusoid from DC source

Discussion in 'The Projects Forum' started by araq, Sep 20, 2008.

  1. araq

    Thread Starter Member

    Aug 26, 2008
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    hye!

    i have to generate a 16khz frequency pure sinusoidal (amp 7vrms, CURRENT0.2A)signal from a dc souce(28v). please indicate me if any such IC is available whih can generate a pure sinusoid from dc source or any othre easy solution.

    i got to know about a function generator ic that could produce pure sinusoid from dc source, it was ICL8038 but unfortunately its data sheet was stamped with the message "NOT SUITABLE FOR NEW DESIGNS".

    another option is to uso 74060 14 stage counter with such a crystal which can produce a sinusoid but waveshaping will need to be done. on the other hand im in a search of an easy and time saving solution.

    can anyone please help me in this regard.

    best regards.
     
  2. beenthere

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  3. bertus

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  4. Audioguru

    New Member

    Dec 20, 2007
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    You forgot to say how much distortion is acceptable.
    An old function genrerator IC had a distortion of about 1% and it was obvious on an oscilloscope and the distortion was heard.
    The posted square-=wave oscillator followed by a second order filter also has distortion of about 1%.

    A good sine-wave oscillator produces a sine-wave with at most 0.005% distortion.
    It is a pure sine-wave.
     
  5. DickCappels

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    Aug 21, 2008
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  6. Audioguru

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    The ICL8038 and the MAX038 are not made anymore.
    The XR2206 is available at Future Electronics. They have thousands in stock.
     
  7. darenw5

    Active Member

    Feb 2, 2008
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    a Wien bridge oscillator, maybe with an extra RC low-pass filter or LC tuned circuit on the output gives very good sine waves. It is hard to say more w/o knowing how pure the sine wave has to be. If you want the output to drive .2A you may need some kind of buffer amp, but that'll almost certainly introduce distortion (just a tiny bit) without careful design
     
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