Please Help

Discussion in 'Homework Help' started by alex22j, May 3, 2014.

  1. alex22j

    Thread Starter New Member

    May 3, 2014
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    1. Using a 5v sin voltage supply as input, a resistor and necessary number of diodes, design the diode limiter circuits for the following specifications:
    a) limit the output voltage within the range [0, V1], where V1 is a number of your choice from the set [3.0, 3.5, 4.0]
    b) limit the output voltage within the range [-V1, V1].
    2. Simulate the designed circuits and correct the design if necessary (might need several steps).
    3. Analyze the results, compare theoretical with the experimental, draw conclusions.
    4. Hint. The Von of the actual diodes you will use may depend on the selected Q-point. Thus the value of the resistor should be selected appropriately to provide for the desired value of the current. You may need to find it by experimenting with the circuit.

    This is what I need to design, but I have no idea how to make the simulation circuit! The circuit I built, doesn't limit my output voltage to V1, what do I do?

    Please help!

    Thank you
     
  2. DerStrom8

    Well-Known Member

    Feb 20, 2011
    2,428
    1,328
    Please show us your work on this so far. We will not give you the answers, but we can help you fix any errors in your own design.

    Regards,
    Matt
     
  3. alex22j

    Thread Starter New Member

    May 3, 2014
    5
    0
    [​IMG]

    I don't know if this image of my circuit works or not.

    But I have a 5V sin voltage in series with a 100K resistor. V1(3V) is in series with Diode 1 and that is in parallel with Diode 2.
     
  4. #12

    Expert

    Nov 30, 2010
    16,354
    6,852
    The image didn't come through. Please try again.
     
  5. alex22j

    Thread Starter New Member

    May 3, 2014
    5
    0
    [​IMG]

    I believe this should work now.
     
  6. #12

    Expert

    Nov 30, 2010
    16,354
    6,852
    So do I.
    I don't know if you're allowed to use the DC voltage source, but you're supposed to know.
     
  7. alex22j

    Thread Starter New Member

    May 3, 2014
    5
    0
    According to the instructions, I have to use the 5V sine voltage as well as a DC source of V1. When I simulate the transient analysis, the I cannot seem to get the output to limit from 0 to 3V max. 3V is my DC V1.e
     
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