basic node equitons using kirschoff

Discussion in 'General Electronics Chat' started by bumle90, Mar 27, 2005.

  1. bumle90

    Thread Starter New Member

    Mar 27, 2005
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    Hello.
    I am having a little problems writing nodal equations using kirschoffs law for a pretty basic circuit.
    I need to write equations for the nodes : a, b and c.

    I have attached circuit drawing as a bmp-file, and hope that somebody can help me out a little.

    Many regards from here.
     
  2. bumle90

    Thread Starter New Member

    Mar 27, 2005
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    0
    Ohh and I forgot to mention that
    x(t) is the input and y(t) is the output.
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Would you be interested in a solution that uses Millman's Theorem or are you interested in seeing the Kirchoff's Law solution only?
     
  4. bumle90

    Thread Starter New Member

    Mar 27, 2005
    6
    0
    Well, I think Kirschoff will suffice.
    I would be very grateful.
    Thank you very much
     
  5. bumle90

    Thread Starter New Member

    Mar 27, 2005
    6
    0
    I have written the following equations: (Are they completely wrong or.. ? )


    a: -(Va/R1)+((Va-Vb)/R2)+(C1*(d(y(t)-Va)/dt))=0

    b: -((Va-Vb)/R2)+(C2*(d(Vb)/dt))=0

    c: -((y(t)-Vc)/R4)+Vc/R3=0
     
  6. bumle90

    Thread Starter New Member

    Mar 27, 2005
    6
    0
    hmm i guess nobody can help me? :/
     
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