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PSPICE ABM question

Discussion in 'CAD' started by Mathias, Mar 14, 2007.

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  1. Mathias

    Mathias Guest

    Dear ng,

    Is there a way to build a programmable (nonlinear) resistor in pspice?
    I currently use an ABM1 block as an input-voltage-dependent voltage
    source. This works fine on the output side, but it doesn't "consume" any
    current on its input side as a real resistor would.

    Thanks for any suggestion,
    Mathias
     
  2. Jim Thompson

    Jim Thompson Guest

    You should be using GVALUE or GTABLE. Then you tie outputs back to
    inputs to get it to "consume" current.

    ...Jim Thompson
     
  3. Mathias

    Mathias Guest

    Hi Jim,

    i think i could use it in the "native spice text input file", but I'm
    lost when trying to use it in pspice's Schematics graphical layout tool.
    Maybe I'd have to define a specific "part" in a textfile and import it
    into Schematics?

    Thanks,
    Mathias
     
  4. Jim Thompson

    Jim Thompson Guest

    What version are you using? PSpice Schematics or Capture (gag me with
    a spoon ?:)

    I don't remember now when GVALUE first appeared.

    What happens if you "Get Part, GVALUE" ?
    You can make almost anything up using .SUBCKT definition and POLY
    notation, if your version lacks ABM's....

    I'm slow this morning, you do say "ABM1", so I'm sure you have GVALUE.

    GVALUE/EVALUE devices accept Algebraic expressions.


    ...Jim Thompson
     
  5. Mathias

    Mathias Guest

    No! It's me who gets sleepy in the evening, you seem already bright awake ;)
    I always prefiltered for parts including "ABM", no wonder I couldn't
    find the GVALUE.

    Thanks a lot!
    Mathias
     
  6. Jim Thompson

    Jim Thompson Guest

    That pre-filtering can turn into a nuisance, not returning easily to a
    full list :-(
    I awoke 5.5 hours ago... it's just now lunch time here ;-)


    ...Jim Thompson
     
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