Before using Multisim to do op amp circuit simulation found that op amp output is more than the phenomenon of power rails, and sometimes want to take the OP put when the comparator do open-loop simulation, but in the Multisim simulation is actually linear amplification, and output over the supply voltage, very depressed, so after simulation is used cadence The orcad/pspice to simulate. But draw a frequency response to use a formula to draw, the signal is more, the operation is not concise. Later found that Multisim's PSpice model can choose their own, and the default op-amp model is not to consider the power of the three-terminal model (3 Terminal Opamp models), the so-called three-terminal is only considered with the impedances, inverting end, the output end. If the 5 Terminal Opamp Model is selected in advance when the op amp is added, the output is limited by the power supply. Set the way as follows: 1, first find the desired op amp model, such as ne5532, the following interface appears: 2, in the Right Model manufacturer/id tab under the selection of the required models, as follows: 3, before you choose to see the model is 3 Terminal or 5terminal; So click on the view model on the right, there is a description of the spice model, such as the following, the fourth row marked 5 teminal opamp model;4, select the model, click OK, put op put 5, Circuit, simulation, complete.
Multisim op amp output is larger than the power supply problem
