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Simulation error with ideal_balun in cadence Virtuoso

NorNand

Hello,

I am using the ideal_balun for the first time to simulate the fully differential amplifier, I found no problem to convert the ground-referenced signal to fully differential signals. But when I put the balun at the output of fully differential signal to convert it to single then I find an error during the simulation and the spectra terminates.

I attached a basic simulation setup with the error message

Thank you for your help in advance    

  • Frank Wiedmann

    You seem to be forcing the common-mode voltage both at the input and at the output, with shorts between the input and the output. That's probably not a good idea. Try replacing the common-mode voltage source at the output by an output port.

  • NorNand
    in reply to Frank Wiedmann

    Dear Frank

    Thank you for your help

    Your suggestion is working for this circuit as shown in the images below,

    However, in the fully diffe

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