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 How to overcome DC convergence error in ultrasim? 

Last post Wed, Jan 16 2013 9:51 AM by glennramalho. 1 replies.
Started by bsddsb 02 Jan 2013 08:10 PM. Topic has 1 replies and 949 views
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  • Wed, Jan 2 2013 8:10 PM

    • bsddsb
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    • Joined on Tue, Nov 27 2012
    • BANGALORE, Karnataka
    • Posts 2
    • Points 25
    How to overcome DC convergence error in ultrasim? Reply

    Hai,

     I am using ultrasim to simulate the circuits. I always get the DC convergence error while simulating and the ultrasim simulation fails. This happens even for simple basic gates and also for other large circuits. Please help me to overcome this error. Looking forward to hearing from you soon.

     Thanking you,

    BSD

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  • Wed, Jan 16 2013 9:51 AM

    • glennramalho
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    • Joined on Wed, Jan 16 2013
    • Recife, Pernambuco
    • Posts 9
    • Points 120
    Re: How to overcome DC convergence error in ultrasim? Reply

    Never tried UltraSim but it is an analog simulator. I have used HSPICE and HSIM though and they usually give convergence problems on digital blocks when there is a floating gate but perhaps a floating VDD/VSS might do it as well.

     Make sure you defined in your test supplies for all globals and also every gate has something driving it.

    • Post Points: 5
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Started by bsddsb at 02 Jan 2013 08:10 PM. Topic has 1 replies.