Extra Credit - Standard Instruments
Extra Credit
Spring 2014
Note: This assignment, if done correctly, is worth 10 points on a quiz. There is no partial credit.
Experiment 4: On page 11 you will find Figure C-4, a practical Miller Integrator circuit. Build
this circuit but replace the DC voltage and switch with a 2.5kHz square wave generated by the
Analog Discovery with an amplitude of 100mV. Generate a plot showing approximately 3 full
cycles of both the input and output voltages. Adjust the vertical scales on the Analog Discovery
oscilloscope to show your input and output voltages as large as possible, without going off the
screen. Using the op-amp integrator equation, show that your circuit is working correctly. Hint:
You have done essentially this experiment previously when you did Exp 4. Save this plot in a
word document and have a TA/Instructor sign here__________________________________.
Remember that the signal must be shown live to get the signatures.
Change #1: Replace the Analog Discovery input signal with one generated using the BK
Precision Function Generator found by the oscilloscope at either side of the classroom. Again,
produce the same two plots measured by Analog Discovery. Save the figure and get another
signature. ______________________________
Change #2: Replace the Analog Discovery with the Tektronix Oscilloscope and make the same
measurements of input and output voltages. Because this is a traditional analog scope, there is no
way to save the displayed signal, except to take a picture of it with your phone. If you have a
camera, you should do this, but it is not required. It is only necessary to show the TA/Instructor
that you have produced the identical signals, as seen by the Analog Discovery, from the plot you
have saved. When you have done so, obtain a signature _______________________________
After you have shown your final measurement to the TA/Instructor, increase the input frequency
by a factor of 20 and change the scales on the scope to show roughly three cycles of the new,
higher frequency input and output voltages.
Hint: You will be able to do this assignment most efficiently if you set up your Analog Discovery
experiment ahead of time and make sure it is working properly. Also, you can try all parts of the
experiment without getting any signatures and then repeat the steps while being observed by the
TA/Instructor. You should also read about scopes and function generators and probably look
over the manuals for the two instruments and tutorials posted on YouTube. Neither video tutorial
is great, but they provide a starting point.
http://www.youtube.com/watch?v=88uLbsbOY-c &
16 April 2014
K. A. Connor
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