Multivibrator circuit with solution

Discussion in 'Homework Help' started by Rumination, May 9, 2016.

  1. Rumination

    Thread Starter Member

    Mar 25, 2016
    74
    1
    [​IMG]
    The figure shows a multivibrator circuit consisting of: an integrator, an Schmitt trigger and a comparator. When the circuit is started up, it delivers a periodic triangular signal OUT_Trekant and a periodic square signal OUT_Firkant.
    Operational amplifiers can be considered ideal, with L+ = 10V and L- = -10V. The circuit includes six diodes that can all be considered ideal, with an ON voltage of 0.7V. These diodes together with R3 form a limited circuit, which ensures a well-defined value size of the output voltage Vout_Firkant.

    1) Determine the maximum positive and negative output voltage swing of the signal OUT_triangle i.e. Vout_Trekant_pos and Vout_Trekant_neg.

    2) Determine the triangle signal switching frequency: f_out_Trekant.


    The deadline is tomorrow night.
    -----------------------------------------------------------------------------
    The given values:
    R1 = 18,6 KΩ.
    R2 = 18,2 KΩ.
    R3 = 100 Ω.
    R4 = 10 KΩ.
    C1 = 0,003216 μF.
    Ain_comp = 3,37 [V].
     
    Last edited: May 9, 2016
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,991
    3,736
    Excellent, use the thread tools button to change the title with "solution posted" when you publish the solution. I look forward to your update.
     
    Rumination likes this.
  3. Rumination

    Thread Starter Member

    Mar 25, 2016
    74
    1
    1) Determine the maximum positive and negative output voltage swing of the signal OUT_triangle i.e. Vout_Trekant_pos and Vout_Trekant_neg.

    We know that L+ = 10V and L- = -10V. And that

    10 V = Vout_Trekant_pos - 0,7
    Vout_Trekant_pos = 10 V + 0,7 = 10,7 V.

    - 10 V = Vout_Trekant_neg + 0,7
    Vout_Trekant_neg = -10 V - 0,7 = -10,7 V.

    Or am I completely wrong?

    I don't understand question b.
     
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