how to compute voltage gain using multisim simulation?

Nour Zeddouri

Joined Feb 8, 2016
17
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

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WBahn

Joined Mar 31, 2012
29,528
First start with the definition for gain that is relevant to the question you are trying to answer.

shteii01

Joined Feb 19, 2010
4,644
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.

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:

Nour Zeddouri

Joined Feb 8, 2016
17
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.

The input signal is 1 mV peak and its frequency is 1 kHz. Draw wire from +leg of oscilloscope to the + side of the voltage source that provides input signal. Draw wire from -leg 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.
thank you for your answer , in fact my problem is about the output signal and the gain ??

shteii01

Joined Feb 19, 2010
4,644
thank you for your answer , in fact my problem is about the output signal and the gain ??
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.