capacitor circuits

Discussion in 'General Electronics Chat' started by bujak18, Nov 12, 2008.

  1. bujak18

    Thread Starter Active Member

    Nov 12, 2008
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    0
    ok! which formulas would not be correct for series capacitor circuits if the capacitors were not assumed to be ideal? why? :(
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Ideal series capacitors are calculated the same way as resistors in parallel; just like ideal parallel capacitors are calculated the same way as resistors in series.

    The problem is that parasitic resistance and inductance are not taken into account in the standard formulas.

    At very low frequencies, the parasitics have little effect. As freqencies increase (even in the audio ranges) the parasitic resistance of capacitors (particularly electrolytics) becomes quite pronounced.

    Have a look at this page:
    http://www.ecircuitcenter.com/Circuits/cmodel1/cmodel1.htm
    In our E-book:
    http://www.allaboutcircuits.com/vol_1/chpt_13/4.html (Series and Parallel Capacitors)
    http://www.allaboutcircuits.com/vol_2/chpt_4/5.html
    http://www.allaboutcircuits.com/vol_1/chpt_13/5.html
    Simple series circuits:
    http://www.allaboutcircuits.com/vol_1/chpt_5/2.html
     
    Last edited: Nov 12, 2008
  3. bujak18

    Thread Starter Active Member

    Nov 12, 2008
    49
    0
    thank you it kinda helped but i need more of a direct answer. srry
     
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