Rc Oscilator with Wien Bridge

Discussion in 'The Projects Forum' started by machok3, Jan 4, 2013.

  1. machok3

    Thread Starter New Member

    Jan 4, 2013
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    Hello,
    I need some help to design an oscilator RC with Wien bridge with the following specifications :eek:scilation freq. between 3-9 KHz, output load 100Ω, automatically controlling the oscillation amplitude achieved with JFET , oscillation amplitude output 10V. I need to use bipolar, JFET, βA723 transitors. I would be greatful if some1 can guide me.
     
  2. machok3

    Thread Starter New Member

    Jan 4, 2013
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    I need a point to start to design like a scheme.... :|
     
  3. tshuck

    Well-Known Member

    Oct 18, 2012
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    machok3 likes this.
  4. machok3

    Thread Starter New Member

    Jan 4, 2013
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    [​IMG] -amp
    [​IMG]- block scheme


    I managed to do a scheme but i dont know if its right... Can some1 tell me if im right?
     
  5. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Your circuit will produce a square-wave output or no output because it is missing a light bulb or Jfet to stabilize its output level.

    Look in Google for a half-decent Wien Bridge oscillator using a Jfet to control its output level.

    You show the schematic of an inverting audio power amplifier that will probably oscillate at a high frequency because it is missing a frequency compensation capacitor.
     
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