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Adding primitive devices to SPICE3 source

Discussion in 'Electronic Design' started by Alec, Feb 22, 2007.

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  1. Alec

    Alec Guest

    I want to add a "smoothly transitioning" switch device to my SPICE3F5
    simulator. There should be a smooth transition between Ron and Roff as
    the controlling voltage is swept between Von and Voff. What I
    really want is to replicate the behavior of the VSWITCH device in
    Pspice.

    I have the "Adding device to SPICE3" document out of Berkeley, which
    merely describes how to integrate your C code into the SPICE source
    code. It doesn't talk about how to create the actual model. Do I need
    to think about as "matrix-stampable" components? Which derivatives do
    I need? I need to know something about analog modeling in spice using
    C.

    I also have the option of writing an XSPICE code model, but it too has
    poor support.

    Can anyone point me to the right book or document?


    Alec
     
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