Page 775 - Mechatronics with Experiments

LABORATORY EXPERIMENTS 761

FIGURE 11.8: Picture of the experiment setup for a first-order passive filter.

frequencies. In order words, record a table of three columns: column 1 = frequency,
column 2 = magnitude ratio, column 3 = phase shift.
4. Obtain oscilloscope screen images (or simply draw a sketch at selected frequencies)
to show the input voltage and output voltage relationship of each filter in the time
domain.
5. Compare your experimental measurements of frequency response with the analytical
predictions. For analytical predictions, plot the transfer function magnitude and phase
®
angle as a function of frequency, that is using MATLAB .
6. Do the same for the high pass filter.

V (t) V (t) V (t) V (t)
i
o
i
o
Low-pass filter High-pass filter

GND GND

FIGURE 11.9: Picture of the assembled circuit on bread-board for a first-order passive low
pass and high pass filter.