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  1. #1
    Junior Member level 3
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    Hspice error in running circuit netlist

    I want to run an encrption circuit netlist in Hspice. I have simulated all the subcircuits of the design separately and they all function correctly. But Hspice cannot run the design, it broke down at the very beginning of the simulation. I don't know the reason since there are some warnings in compiling log. Here is the option summary part of the log:

    **warning** No DC path to ground from node 0:c<0> defined in subckt 0 ; Connected by HSPICE with gdcpath

    ************************************************** ***************
    ****** option summary
    ******
    runlvl = 3 bypass = 2
    Opening plot unit= 15
    file=katan_TFET.pa0

    no convergence with standard algorithm, trying damped pseudo-transient

    **info** time step too small in pseudo tran. delta= 5.4817E-19
    *** final try failed ***
    *** gshunt ramping started ***

    I don't know what wrong with my netlist file? Can any one tell me? thanks!

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  2. #2
    Newbie level 4
    Points: 249, Level: 2

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    Re: Hspice error in running circuit netlist

    It looks to me that the simulator is having trouble finding a solution due to convergence problems. The reason for this can be many fold.. You can try standard convergence solving routines
    - http://www.intusoft.com/articles/converg.pdf
    - consult google

    good luck!



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