simulation error

[anastvl]

 I am trying to simulate 
Error message from simulation: doAnalyses: Iteration limit reached
Error message from simulation: ac simulation(s) canceled
Error message from simulation: doAnalyses: Timestep too small
Error message from simulation: tran simulation(s) canceled

[Tien_P]

Hi,

It looks like the problem is the LM837 model.  I search TI website and unfortunately, they don't have a model available for download.  I looked up a replacement part for the LM837 and Maxim suggested a few parts as shown on this page:

http://www.maximintegrated.com/alternatives.cfm/part/LM837/pk/679

I looked up the MAX410 and there is a model available for it:

http://www.maximintegrated.com/design/tools/modeling-simulation/spice/operational-amplifiers/macro/M...

Other parts may have model available as well.

[anastvl]

Hi, 

Thank you very much for your help, I have replaced the LM837 with Max 414 but unfortunately I can't simulate my circuit 

------ Checking SPICE netlist for Design1 - Κυριακή, 29 Σεπτεμβρίου 2013, 3:24:20 μμ ------
======= SPICE Netlist check completed, 0 error(s), 0 warning(s) =======
Error message from simulation: doAnalyses: Numeric overflow in device model
Error message from simulation: ac simulation(s) canceled
Error message from simulation: doAnalyses: Timestep too small
Error message from simulation: tran simulation(s) canceled

[Tien_P · Accepted solution]

Hi Anastvl,

Your model mapping was not setup correctly.  The following section from the model is very important, it declares model pins and the order,  you need this information to properly setup mapping table in Multisim.  The first pin declared in this model is the non-inverting input, second pin declared inverting input ... last pin is output.  The key is to look at the subckt line in the model and know the order that the pins are declared.

*////////////// MAX414 MACROMODEL //////////////////
*
* connections:         non-inverting input
*                       |      inverting input
*                       |      |      positive power-supply
*                       |      |      |    negative power-supply
*                       |      |      |      |       output
*                       |      |      |      |       |
* NODE CONNECTIONS:     1      2      99     50      97
*
.SUBCKT MAX414  1 2  99 50 97

In Multisim, the model mapping table is shown below.  Below the column "Model nodes" is where you map the pin order corresponding to the subckt line from the model. 

You should refer to the following tutorial for a component guide to create a multi-section component.

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YH5fCAG&l=en-US

[anastvl]

Thank you very much. It works