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  3. how create a ".cir" file in Orcad 16.3

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how create a ".cir" file in Orcad 16.3

zizo2012
zizo2012 over 11 years ago
Hello, 
I would like to create a "cir." file in Orcad 16.3 but I'm a little lost, is that you can help me? 
is and what you can tell me how to change the number of output bipolar transistors, ie, I find in the software transistors 3 terminals (EBC), while I want to add the substrate channel but I do not know how. and when I change the netlest and I run the simulation it removes all the changes I did. 
Thank you for your help.
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  • oldmouldy
    oldmouldy over 11 years ago

    A CIR file is a text file that describes the netlist to the PSpice Simulator, you can create a CIR file with a text editor, if required. IF you use OrCAD Capture to create the schematic and run the PSpice Simulation from there, the CIR file will be recreated for each run where the schematic has changed. You can access the "4 terminal" bipolar transistors from tbe "breakout" library, QBREAKN4 and QBREAKP4, for the npn and pnp, respectively. If you are using the "text" approach, just specify 4 nodes, rather than 3 when invoking the model. See the PSpice Reference Manual, pspcref.pdf in the doc\pspcref directory of the installation for model details, see the PSpice User Guide, pspug.pdf in the doc\pspug directory of teh installation for usage of Capture and PSpice for simulating circuits.

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  • zizo2012
    zizo2012 over 11 years ago
    thank you very much.
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  • zizo2012
    zizo2012 over 11 years ago
    Hello, 
    I need to change the parameters of the bipolar transistor with 4 terminals, but when I save the QbreakpN4 component in a new library, I see that the fourth track is removed and I have a NPN transistor with 3 terminals. 
    How can I save the QbreakpN4 component in a new library keeping the 4 channels?
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  • oldmouldy
    oldmouldy over 11 years ago

    The Substrate is optional so you will need to take some manual steps to add it into the symbol. Open your saved symbol and add a pin for the substrate, name the Pin, say, sub, and give it an unused number, say 4. Save the modified graphical symbol, then Options>Part Properties, locate the PSpiceTemplate property and edit it to add the "sub" pin:

    Q^@REFDES %c %b %e %sub @MODEL

    And save that symbol. Now you can place the symbol for your 4 terminal transistor and connect the substrate, as required, in the schematic. (Note that you are using the pin name on the symbol to connect the nodes in the model)

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  • zizo2012
    zizo2012 over 11 years ago
    hello, 
    I can not follow what you tell me. I want to transform a Q2N2222 transistor to a 4 pin transistor, but I can not arrive. Can you give me more explanation 
    Thank you
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