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Temperature Pin on PSPICE models

Discussion in 'Electronic Design' started by PaulCsouls, Jan 12, 2006.

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  1. PaulCsouls

    PaulCsouls Guest

    Some of the newer Orcad 9.1 PSPICE models have a temperature pin in
    them. How do you make a part for MicroSim 8.0 that ties this pin to
    the temperature?

    Thanks

    Paul C
     
  2. Jim Thompson

    Jim Thompson Guest

    It's set by model parameter T_REL_GLOBAL or T_REL_LOCAL.

    I don't know if v8 can do that. (I have v10.5)

    ...Jim Thompson
    --
    | James E.Thompson, P.E. | mens |
    | Analog Innovations, Inc. | et |
    | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
    | Phoenix, Arizona Voice:(480)460-2350 | |
    | E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
    | http://www.analog-innovations.com | 1962 |

    Anyone can be rude, but it takes a Democrat to be a real dirtbag.
     
  3. PaulCsouls

    PaulCsouls Guest


    I don't understand. If you look at the first couple of lines of the
    NDS9410a model, there's an extra pin. Pin 50 VTEMP. When I make a
    symbol I have to include this pin. The model works but I need to
    drive this pin with a 27Volt source. I'd rather have this pin be
    driven by the normal .TEMP parameter. Is there a way to attach a pin
    to a parameter?
    Thanks

    Paul C
     
  4. Jim Thompson

    Jim Thompson Guest

    Aha! Someone has hokeyed up a model so that an applied voltage is
    local temperature.

    Are you wanting to do a temperature sweep, or some other analysis, but
    set temperature?

    If you do a behavior VCVS with expression = {TEMP}, you'll get a
    voltage equal to the temperature.

    (I'm pretty sure that works in v8.)

    ...Jim Thompson
    --
    | James E.Thompson, P.E. | mens |
    | Analog Innovations, Inc. | et |
    | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
    | Phoenix, Arizona Voice:(480)460-2350 | |
    | E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
    | http://www.analog-innovations.com | 1962 |

    Anyone can be rude, but it takes a Democrat to be a real dirtbag.
     
  5. PaulCsouls

    PaulCsouls Guest

    Yes, I'm trying to do a nested temperature sweep on a whole circuit.
    Fairchild seems to be adding these weird VTEMP pins in their SPICE
    models. I'll try the VCVS = {TEMP} trick. I also try making the pin
    hidden and sticking {TEMP} into the IPIN.

    Thanks

    Paul C
     
  6. PaulCsouls

    PaulCsouls Guest

    Fairchild has an explanation on how to use these models.

    http://www.fairchildsemi.com/models_static/spicemanual.html

    Paul C
     
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