Filter Design

Observations
Table: Filter gain versus frequency
Frequency
[kHz]
Vin
[V]
Vout
[V]
0.1
0.2
0.5
0.75
1
2
3
4
5
6
7
8
9
10
15
20
50
100
Gain
[V/V]
Gain [dB] =
20log 10 |Vout/Vin|
1. Use your experimentally measured values to plot the magnitude of the Gain [dB]
( | |) of the frequency response (the Bode plot) with Excel. Plot the
magnitude (on a linear scale) on the ordinate axis and frequency (on a log scale) on
the abscissa axis. This is the magnitude portion of the Bode plot.
2. Use your experimentally measured values to plot the Gain [V/V] ( ) with Excel.
Plot the magnitude (on a log scale) on the ordinate axis and frequency (on a log
scale) on the abscissa axis.
3. Compare the plot of of your experimentally measured values to your PSpice
simulation of of the circuit. Or, you may compare the plot of | | of
your experimentally measured values to your PSpice simulation of | |.
4. You are required to include the following PSpice plots:
a) (log scale) vs. frequency (log scale)
b) | | (linear scale) vs. frequency (log scale)
i. Consult Prelab 5 for how to plot | | in PSpice.
5. Determine the cut off frequency from the plot of | | (linear scale) vs.
frequency (log scale) and compare it to the theoretical value.
6. Compare the actual and theoretical 20 Log (1 + R F /R G ) pass band gains.
Date Last Modified: 5/6/2013 11:53 PM 7