EB-122 Operational Amplifiers 2
Innovative Technologies in Education (ITE)
EB-122 Operational Amplifiers 2
The EB-122 is a single board comprehensive instructional module
designed to teach advanced concepts of operational amplifiers to
technology students. The module can be operated as a stand-alone
unit or integrated to the newly developed EB-2000 Computer Managed
Laboratory. The module contains experimental circuits with which
the student performs a number of conceptual experiments at various
levels of difficulty. Manual or computer driver fault-finding exercises
and testing are available when the module is interconnected to the
SB- 2000 sys tern, providing valuable experience in the training
and diagnosis of faults. Test equipment, when used, attaches to
the board via 2mm jacks, placed at various points around the circuits.
Students are required to do only a minimal amount of wiring so training
time is maximised. A comprehensive student manual is provided with
each training module. The manua1 correlates to the exercises to
convey concepts relating to the technologies covered, allowing focus
on specific performance objectives.
Description
The EB-122 module is designed so students will spend the maximum
time on the experiments and practice drills for testing comprehension
and troubleshooting. The module also ensures that students use their
time more efficiently. The printed circuit boards are pre-wired
so that set-up time is minimal. For operation the module is connected
to a PUZ-2000. To facilitate the exercises, all the major signals
are brought out on-board with 2mm jacks for tests and interconnections.
The ICs and the transistors are mounted on sockets, enabling easy
replacement. The student has only to plug-in the appropriate patching
cords and shorting plugs in order to perform the recommended experiments.
The boards also come equipped with "black boxes" containing
components used in the fault-finding and practice modes, components
that should not be visually identified by the trainee.
OBJECTIVES
Obtain the transfer characteristic curve of the noninverting comparator.
Obtain the input and output waveforms of the window comparator.
Obtain the transfer curve of the window comparator.
Use the oscilloscope to obtain the input and output waveforms of
an integrator.
Determine how a change in the value of the feedback capacitor changes
the output waveform.
Determine how a change in the feedback capacitor changes the gain
of the integrator.
Use an oscilloscope to obtain the input and output waveforms of
a differentiator,
Determine how a change in the value of R changes the gain.
Measure the input and output voltages at various frequencies.
Calculate the gain from measured values for various frequencies.
Plot the frequency response curve on semi-logarithmic paper for
the low pass filter.
Determine the half-power (or break) frequency from the graph of
the low pass filter.
Compare the break frequency obtained from the graph with the calculated
value.
Determine the half-power (or break) frequencies of the band pass
filter from the graph.
Determine the centre frequency (cf) from the graph.
Determine the bandwidth from the graph.
Obtain the output waveform of the regenerative oscilloscope.
Use the oscilloscope to display the input-output transfer curve
of the regenerative comparator.
Obtain the output waveform of the square wave generator.
Use the oscilloscope to obtain the frequency of the square wave
generator.
Use the oscilloscope to determine the correct output voltage waveforms
of each stage.
Locate faulty stages by comparing the actual output waveforms with
correct output waveforms.
RECOMMENDED EXPERIMENTS
Comparators
Integrators
Differentiators
Low and Band Pass filter
Regenerative Comparators (Schmitt Trigger) - Square wave generator
Troubleshooting
REQUIRED ACCESSORIES
DL-20 Standard set of 2mm Patching Cords and Shorting Plugs
REQUIRED MEASURING EQUIPMENT
20MHZ Dual Trace Oscilloscope
Digital Multimeter 3-1/2 Digits
2.2MHZ AM/FM Function T Generator
MANUAL
Student and instructor manuals, written by pedagogues and electronics
professionals support every stage of the learning and teaching process.
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