HI Hero999
What op-amp IC did you use?
What does the term IC refer to? Is it input current?
Google it.
Compare the voltages at clipping with the saturation positive and negative satiation voltages on the data sheet.
What is clipping?
See the drawing at the top of page 7 of your assignment.
I think you said somewhere that the op-amp's output voltage reaches the supply voltage but it doesn't, it never reaches the supply voltage.
You've already partly done it. When the output voltage tries to exceed the supply voltage minus the op-amp's saturation voltage , it stops rising and gets stuck. All you need to do is compare the measured saturation voltage with what's listed on the datasheet.
What was the tolerance of the resistors?
Nobody has mentioned this during the project. Why is this important and how do I do that?
Well you've been asked to explain why the the values you've measured differ from the calculated values?
As I think you've said there's a variance in the component values, this is known as the tolerance. If the results differ more than the tolerance of the component values used in the circuit then, there must be another source of error.
Look at the percentage error rather than the absolute error. Hint the results for non-inverting amplifier with a gain of 2 are worse than the inverting amplifier with a gain of 10.
Are my errors the difference between theoretical and measured values. I then find percentage error from them?
Yes that's it.
Always calculate the percentage error, for example 100mV of error isn't much when the voltage is 20V, but when it's 1V, 100mV is a significant error.
You do realise you can draw a sinewave in spreadsheet program Excel?
No I didn't. If there is time after I have succeeded in completing the content correctly, I will take a look at that. Thanks.
See attached.
Note that I don't have Excel, I saved the file from OpenOffice which is 99% MS Office compatible but that means that some documents saved with it might not open brilliantly with MS Office. I checked the file with MS Excel viewer and it seems all right but just letting you know that if it's slightly scrambled it's not my fault.
Unfortunately I didn't draw graphs for the first inverting scope graph when looking at the gain, and so am now guessing the time scale based on the next graph. What do you think? I can't get back into the lab before the report is due either.
You know the frequency so you should be able to calculate the time scale.
added:
-Diagrams of circuits connections for inverting and non-inverting amps and diode connection.
-Set up of circuit connection. The power supply was set to 15V. The signal generator was set to give 2.0V peak-to-peak at a frequency of 1.0kHz, for both types of amp.
- input time scale and voltage to graphs
- created .pdf file[/QUOTE]