# SOLVED: Fourier Transform Lab

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## Description

This week’s lab is based on the application of Fourier analysis of an RL circuit in
Multisim.
Construct Figure 18.44 in Multisim with Vi(t) set to the pulse train as below. 1. Run simulation to perform Fourier and Transient Analysis to measure the
output voltage ‘Vc (t)’.
a. Record the voltage ‘Vc (t)’ and the current ‘I’ through the capacitor
in the table below.
b. Take the screen capture for the measurements for ‘Vc (t)’ and line
spectrum from Fourier analysis.
2. Add 5% tolerances to resistor and inductor and repeat step 3.
Measured ‘Vc (t)’ Measured current ‘I’ Without Tolerances With Tolerances
a. Explain the effect of tolerance on output voltage ‘Vc (t)’.
b. Identify the frequencies and trace the frequency spectrum for the
voltage ‘Vc (t)’.
c. How does tolerance effect the frequencies in the spectrum and the
output voltage? Explain with the help of measurement results and
screenshots. Circuit Analysis For the circuit below, perform the following:

1. Given an AC input voltage of Vrms = 200Vrms and a sinusoidal frequency of omega = 120pi rad/sec, determine the following: ◦V1peak (peak value of AC input voltage)
• V1(peak-to-Vpeak )(peak to peak value of AC input voltage)
•  Frequency of input voltage V1 in Hz.
•  V2peak (peak value of AC output voltage)
•  V2(peak-to-Vpeak )(peak to peak value of AC output voltage)
•  Frequency of output voltage V2 in Hz. 2. Construct circuit in MultiSIM using calculated values for V1.

3. Capture a screenshot that shows V1 and V2 on an oscilloscope XSC1.
4. Submit calculations, MultSIM screenshot and MultiSIM circuit (.ms11) file For the circuit below, perform the following:

1.  Given a voltage gain of -10, determine the value of R2.
1. Calculate the peak-to-peak value of Vout and rms value of Vout.
1. Construct circuit in MultiSIM with calculated value of R2.
1. Capture a screenshot that shows the input voltage V1 and output voltage Vout in MultiSIM with an oscilloscope XSC1
1.  Submit calculations, MultSIM screenshot and MultiSIM circuit (.ms11) file
• CH-week-8.zip