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Wien-bridge oscillator questions

Discussion in 'Datasheets, Manuals or Parts' started by hadoque, Jul 24, 2007.

  1. ivanseng

    ivanseng New Member

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    audio guru,

    ur allpass filter circuit.. The Rx R and C how to determine the shifting ?
     
  2. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Look at Allpass Filter in Google.
     
  3. shirazmacuff

    shirazmacuff New Member

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    tl071cp oscillator


    Hi all
    I’m working on a similar oscillator using the tl071cp. I cannot seem to get it to oscillate. Can this unit be used in the circuit above, the circuit with the single supply voltage meaning + - or does it need + 0 -?
     
    Last edited: Dec 21, 2007
  4. dave

    Dave New Member

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  5. audioguru

    audioguru Well-Known Member Most Helpful Member

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    The oscillator circuit above doesn't use an opamp. It uses an LM386 power amp IC. This IC has its inputs already biased so that they work when their DC voltage is at ground. It also has negative feedback built-in. An opamp would need to have its inputs biased at half the supply voltage and have negative feedback resistors added.

    An opamp doesn't have enough output current to drive the AGC lightbulb.

    Look in Google. There are hundreds of Wien-bridge oscillator circuits that use an opamp.
     
  6. Hero999

    Hero999 Banned

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    Connect three in parallel to get 9:eek:hm: which is close enough.
     

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