MultiSim SPICE has a variety of measurement instrument simulations.

I don't simulate much though, I use it for schematic capture and PCB layout. Bode Plot Graph: It is a graph used to check the asymptotic bode plots with transfer. A blank schematic diagram screen will appear. I only have Multisim 9, then I stopped paying for updates but it still works. NI Multisim Live lets you create Multisim Component Reference Guide January 2007 374485A-01 ComponentRef. Low Pass Filter Bode Plot (-3.01dB magnitude) Comments (0) Copies (5) There are currently no comments. Try stepping some of the passive device parameters and seeing what you have to change to push the Bode plot along the path you want then try to understand why that worked or did not. Its hard to say without making you virtually write a paper outlining all the steps. The simulation may include parasitic impedances of other components or tolerance worse case or may have actual values for active components whereas your calculation was idealized. Assuming you are asking why does my simulation get different results than my calculation? I might guess that the math underlying the simulation was not exactly the same as the formulas you chose to make you paper calculation. I think you would get better answers from the NI MultiSim forum anyway. There are much better modern parts out there.Your image did not come through so I think part of the question is missing. They are both parts that are probably older than you are. We now have an operational amplifier circuit that will amplify each individual input voltage and produce an output voltage signal that is proportional to the. An OP37 has a 60 MHz GBP, but it is not stable unless you have a gain of 10. Pick one and pull up the data sheet and make sure that it is unity gain stable that has a model in your simulator.įor example an OP27 has an 8 MHz GBP and is unity gain stable. Fundamentally you can spend days choosing an op amp. Open up two windows one the selection in your simulator and the other being a parametric searchįilter the search on single op amps with a GBP between 10 and 50 MHz, active part, single op amp per package. I am not sure what you have models of in your simulation package. If you need the part to work at 100 times the cutoff frequency lower the frequency of your design until the LM741 works then pick with with a GBP that is the ratio of the two frequencies times 1.7 MHz. Shifting it lower tells you what to expect when you get the new part. Bode plots are traditionally done in log axis and are most useful to determine the role of frequency on the circuits and as you might have found out this circuit is strongly frequency dependent. Try something that has a gain bandwidth product greater than 10 MHz, that is unity gain stable.

Multisim how to make a bode plot