Yes, it's the resistor ratio that matters and you can choose any sizes within reason. Also, check the amplifier response to smaller inputs to see if it is linear if you avoid driving the output close to the rails. You might want to look through the spec sheet to see how closely it can drive its output to the rails. It could be that the op-amp is not capable of driving all the way to the supply rails. Why would the resistances matter, as long as they are in a ratio of 5/1? The question implies to me that there are specific resistances. Here is my inverting amplifier, it won't actually run at the moment, something is messed up with this circuit.Īlso, it looks like my simulation is not producing an output voltage that is -5Vin, it is -4.88Vin. I'll attach the lab, but I am working on page 4, asking for the R_f and R_in. First of all, the diagram on page 3 has only 3 connections leaving the op-amp, and the one on multisim has 5 connections, so I don't really know what to do with the other 2. I was able to prove the relationship on page 4, but now I'm stuck on the part about simulating the circuit. The ''Negative Supply Label'' is pins 2 and 6.

On page 2, my pin diagram is the same as the pin diagram on the 1st page of the datasheet at the top left for the TLC227 (D, JG, P, or PW Package)įor page 3, I have the ''Positive Supply Label'' as Pin 3 and 5. Sadly we have not learned about Op-Amps, and by design our instructor has us do problems involving things not taught in class in order to force us to do research and such, so I am pretty lost with this. I am working on the prelab for my class right now, and I am having difficulties understanding how to get my Multisim to work.

Multisim 12 vs 14