how to compute voltage gain using multisim simulation?

Discussion in 'Homework Help' started by Nour Zeddouri, Mar 22, 2016.

  1. Nour Zeddouri

    Thread Starter New Member

    Feb 8, 2016
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    hello , plz my Q is how to measure the voltage gain using the oscilloscope in multisim simulation??
    the circuit is about biasing single transistor amplifier
    thank you in advance
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    4,804
    First start with the definition for gain that is relevant to the question you are trying to answer.
     
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  3. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    Here is how I did it in the laboratory assignments.

    Look at the oscilloscope picture. Your oscilloscope has two channels, Channel A and Channel B. Channel A has two legs, + leg and - leg. Same for Channel B.

    Let us start with the input signal.
    The input signal is 1 mV peak and its frequency is 1 kHz. Draw wire from +leg Channel A of oscilloscope to the + side of the voltage source that provides input signal. Draw wire from -leg Channel A of oscilloscope to the ground. Double click on the oscilloscope picture to open the oscilloscope display and oscilloscope controls. Adjust Channel A controls to show your signal, change the vertical scale to 5 mV or even 2 mV, change horizontal scale to \frac{1}{1 kHz}=1 ms. Now turn on the simulation and see if your input signal will show.
     
    Last edited: Mar 22, 2016
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  4. Nour Zeddouri

    Thread Starter New Member

    Feb 8, 2016
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    thank you for your answer , in fact my problem is about the output signal and the gain ??
     
  5. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    Do the same to the output signal, do it on Channel A or Channel B. Pause the simulation. Then move the trace to measure the peak of the output signal. You know input is 1 mV peak. The trace will show the peak of the output. Output divided by input is your gain.
     
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  6. Nour Zeddouri

    Thread Starter New Member

    Feb 8, 2016
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    Thank you very much
     
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