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  1. #1
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    switch orcad

    Hi to all!
    I want ot model the behaviour of a transistor as an electronic swich. Hence I don't know the type of the transistor,yet so I want ot model it's behaviour as a swich by some element which has two states ON and OFF!!!

    Is there such element in PSPice libraries or not?

    10x in advance

    •   Alt10th June 2004, 19:11

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  2. #2
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    orcad switch

    Hi,

    You can use voltage controlled switch (Sbreak) or current controlled switch (Wbreak). This components are also available in the lite version of pspice, pspice student.


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  3. #3
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    pspice switch model

    10x for the answer papyaki! :)

    Can you or someone else tell me how to control this swich?
    I read the PSpice user giude and saw about this swich, but did'n figure out how to controll it. The control voltages are set to Voff=0.0 Von=1.0.
    The swich is connected with VPULSE source whis values are: V1=0V, V2=5V. Unfortunateluy the swich didn't toggle :(
    Here is the configuration

    Is this configuration correct?

    10x for the answers


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    •   Alt11th June 2004, 22:34

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  4. #4
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    switch in orcad

    Hi,

    I have simulated the schematic here after with your Vpulse parameters.

    It gives the probe following curves with Vin = Vpulse and Vout = switch output.

    Did you use a power supply and a resistor in serie with the switch output ?

    The switch is a resistor with two possible values : Ron = 1 ohm and Roff = 1E9 ohms



  5. #5
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    sbreak orcad

    This configuration works just fine!
    10x again papyaki!
    This swich is very suitable to model the behaviour of a MOSFET transistor!
    I wanted to see if the swich is working and to concentrate on the circuit.
    Now I am sure it is!



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    orcad vpulse

    Still usefull 4us students, thanks for the original solver.



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    switch library orcad

    In orcad Pspice, there are websites that have modeled the components and from which you can freely download what ever you want. Search the web



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