Colpitts oscillator

Discussion in 'The Projects Forum' started by GaryM, Dec 2, 2009.

  1. GaryM

    Thread Starter Member

    Nov 28, 2009
    37
    0
    Hello ,

    I am designing a colpitts oscillator. The inductor is fixed at 0.161m (see attached schematic). So I have to calculate the values of the cpacitors to give a particular frequency. Now I need to calculate the values of caps C7 and C8 for an oscillation frequency of 10kHz. After the calculation, I got the values of 5u and 2.3u...but the circuit does not oscillate using these...Can any one please tell me why???
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    Deja vu. You really need to stick with the posts you've already started.
     
  3. GaryM

    Thread Starter Member

    Nov 28, 2009
    37
    0
    Sorry but im just trying lots of differrent things and hence i have to ask different questions...
     
  4. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    144
    Unless there is something your specifically want to deviate from the original thread, can I merge this with the original so all posts are in the same place. We don't want two threads asking the same question.

    Dave
     
  5. GaryM

    Thread Starter Member

    Nov 28, 2009
    37
    0
    That will be fine
     
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