[Multisim] Transient time point calculation did not converge

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Discussion Overview

The discussion revolves around a simulation issue encountered in Multisim, specifically regarding transient analysis where the calculation did not converge. Participants explore potential causes and solutions related to circuit configuration and component models.

Discussion Character

  • Technical explanation, Experimental/applied, Debate/contested

Main Points Raised

  • One participant reports an issue with transient analysis in Multisim, noting that the simulation was canceled due to non-convergence.
  • Another participant mentions trying different op-amp models but continues to experience the same error.
  • A suggestion is made to modify the circuit by cutting certain voltage sources in half or setting them to zero, and to add a resistor to ground to check for a stable DC operating point.
  • There is a recommendation to perform AC analysis as part of troubleshooting.
  • A later reply indicates that the issue was resolved by correctly connecting the power supplies to the op-amp.

Areas of Agreement / Disagreement

The discussion includes a mix of troubleshooting suggestions and a resolution, but it does not indicate a consensus on the initial causes of the convergence issue.

Contextual Notes

Limitations include the lack of detailed information on the circuit configuration and the specific models used, as well as the absence of a thorough exploration of the reasons behind the convergence failure.

etf
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Hi. I have problem simulating this circuit in Multisim:

(LTSpice)

2cwms6h.png


Here is scheme from Multisim:

2nhkwvp.png


When I run transient analysis, I got this:
------ Checking SPICE netlist for Design3 - Saturday, September 26, 2015, 10:58:03 AM ------
======= SPICE Netlist check completed, 0 error(s), 0 warning(s) =======
Transient time point calculation did not converge
Simulation canceled
Any idea what's wrong? Thanks in advance
 
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I tried different models of opamp and I got same error. Here is my version of software:

2n8detf.jpg
 
cut v4 and v1 in half or set to 0 just to see what happens. Add a 10k to ground on the output to see what happens.

Do you get a stable dc operating point?

Have you tried AC analysis?
 
  • Like
Likes   Reactions: etf
Solved, I didn't connect power supplies to op amp correctly :)
 

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