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GMIN Stepping really failed!

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(joined May 2017)
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Hi. Im trying to simulate this Transmitter circuit for my final year project. As Im trying to do the analysis it stated that ‘GMIN Stepping really failed!’. How can I solve this problem? Im looking forward to testing the analysis on Optisystem afterwards.

Responses (1):

    • #43925
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      Khairul Ridzuan
      Participant

      Hi. Im trying to simulate this Transmitter circuit for my final year project. As Im trying to do the analysis it stated that ‘GMIN Stepping really failed!’. How can I solve this problem? Im looking forward to testing the analysis on Optisystem afterwards.

    • #44400
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      Cem Bonfil
      Moderator

      Hi,
      This error usually occurs when the simulator cannot find a DC solution for the first time step. This can be very challenging when you have multiple transistors in a circuit. Instead of starting your voltage or current sources from a certain value you can try to ramp them up slowly (using Vpulse or Ipulse) during the transient simulation.

      Cem

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