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Help on spice syntax

Discussion in 'Electronic Design' started by Jeff, Jun 24, 2007.

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  1. Jeff

    Jeff Guest

    Hi All,

    I am new to SPICE. I hope I can use it to verify the ideas without
    working on breadboards. Here's my question:

    I have code like this:

    ..Param X64=8
    Q_Q5 $N_0024 $N_0023 $N0025 PNP8 {x64}
    ..Model PNP8 PNP

    The problem is my simulator doesn't understand what
    "Q_Q5 $N_0024 $N_0023 $N0025 PNP8 8" means. I tried my textbook,
    couldn't find what the last "8" means either. I want rewrite it in a
    way that my simulator can recognize.

    Could someone help?

    Thanks in advance,
  2. Jim Thompson

    Jim Thompson Guest

    Every simulator I know of would recognize that means "Area=" 8

    Except I just realized...lose the "x" and the curly brackets.

    ...Jim Thompson
  3. Jeff

    Jeff Guest

    I am using Protel se 99, pretty old software to capture schematic and
    design PCB. It has a built in spice simulator. Maybe I need find some
    other solutions.

    Code like this can not be recognized either:

    m8 550 550 V- V- nix l=2u w=25u m=26

    ..model nix nmos(vto=0.75 kp=205.5u rd=1 rs=1 rg=1 rb=1 cgso=4e-9
    +cgdo=4e-9 cgbo=16.667e-9 cbs=2.34e-13 cbd=2.34e-13)


  4. Hello Jeff,

    You could use LTspice to run your netlists.
    I have checked both of your examples and they run in LTspice.
    Even better you could use LTspice for your schematic too.

    LTspice is a free unlimited SPICE simulator from Linear Technology.
    I assume it's now the mostly used SPICE simulator.
    User group

    Best regards,
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