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Problems with AC simulation in OptiSPICE 5.2

(joined January 2021)
Participant

I have a problem with performing AC analysis in a set with an account amplifier? I have tried two ways to do this analysis:
1) Setting the Vdc3 value to zero, on Vac1 the value of 1V – while you pass the same zero, it sets the Q2 transistor and the R2 resistor.
2) The commands to the netlist Vdc3 SIG5 0 2.5 AC 1 – in this case, the same reset is also made on the Q2 transistor and the R2 resistors.
I am asking for help because I do not know what I am doing wrong.

Responses (1):

    • #69964
      Sylwia Kojtek
      Participant

      I have a problem with performing AC analysis in a set with an account amplifier? I have tried two ways to do this analysis:
      1) Setting the Vdc3 value to zero, on Vac1 the value of 1V – while you pass the same zero, it sets the Q2 transistor and the R2 resistor.
      2) The commands to the netlist Vdc3 SIG5 0 2.5 AC 1 – in this case, the same reset is also made on the Q2 transistor and the R2 resistors.
      I am asking for help because I do not know what I am doing wrong.

    • #70058
      Profile Photo
      Saurabh Bedi
      Moderator

      Hello Sylwia,

      I am not sure I understand your approach correctly. There might be a convergence issue.
      Can you share your file so that I can take a close look?

      Best,
      Saurabh Bedi.

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