+ Post New Thread
Results 1 to 3 of 3
  1. #1
    Newbie level 3
    Points: 724, Level: 5

    Join Date
    Dec 2008
    Posts
    4
    Helped
    0 / 0
    Points
    724
    Level
    5

    Modeling a device in SPICE

    Hi

    I am trying to model the IMOS transistor in SPICE, but I don't know where to start. I simulated the device in MEDICI and I have all the Current-Voltage characteristics, and the capacitances. The problem is that the Id-Vg and Id-Vds curves do not fit to MOSFET's equations. So I cannot modify a MOSFET model. I need to add equations to create the model. Could someone please help me on how to add equations to a model?
    I use HSPICE, and if it does not offer such an option, is there any other tool?

    Thanks.

    •   AltAdvertisment

        
       

  2. #2
    Super Moderator
    Points: 251,591, Level: 100
    Awards:
    1st Helpful Member

    Join Date
    Jan 2008
    Location
    Bochum, Germany
    Posts
    43,812
    Helped
    13322 / 13322
    Points
    251,591
    Level
    100

    Re: Modeling a device in SPICE

    With HSPICE, implementation of new analog device types can be done as proprietary model through the C++ programming interface, requiring profound knowledge of the SPICE analysator operation however. The same option exists with original Berkley SPICE. This method should be preferred, if a larger number of devices and/or long runs are intended in the analysis.

    Another option is to design macromodels from analog behavioural blocks, implementing the device equations as far as needed for the present simulation task.



    •   AltAdvertisment

        
       

  3. #3
    Newbie level 3
    Points: 724, Level: 5

    Join Date
    Dec 2008
    Posts
    4
    Helped
    0 / 0
    Points
    724
    Level
    5

    Re: Modeling a device in SPICE

    Thank you for the response. As I searched more, I found out that HSPICE can handle the lookup tables. Does the behavioral block include the lookup table option?



--[[ ]]--