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Community PCB Design & IC Packaging (Allegro X) PSpice VCVS and Laplace syntax

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VCVS and Laplace syntax

AB_1719507089133
AB_1719507089133 10 months ago

Very new to this forum and PSPCE.

I am trying to simulate a IRIAA input signal to a phono circuit.

I am using a VCVS, fed via VAC Sine source with Laplace output.

I am assignign the Laplace expression to the GAIN variable, as this appears to be the only way.

E_E1 10 0 N03563 N04684 Laplace
+ {V(10)}=(((s*.00318+1)*(s*.000075+1))/((s*.000318+1)))/10

My understanding is that the syntax for a VCVS in this case is:

E <(+) node> <(-) node> LAPLACE { } = + { }

But I don't believe that I have something configured right.  

Very frustrated, thanks in advance.

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  • retiredEE
    0 retiredEE 10 months ago

    Use an ELAPLACE part from the abm.olb library.
    This is the RIAA recording characteristic curve that works for me.
    If needed, add a gain constant as required.

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  • AB_1719507089133
    0 AB_1719507089133 10 months ago in reply to retiredEE

    I must have the syntax wrong as I had the transform and the part, but it still does not work.

    E_E1 10 0 N03563 0 Laplace
    + {V(10,0)}=(((s*.00318+1)*(s*.000075+1))/((s*.000318+1)))/10

    ERROR MESSAGE:

    ERROR(ORPSIM-16152): Invalid number: Error while converting token 'Laplace' to double value. Token can be a constant or expression
    + {V(10,0)}=(((s*.00318+1)*(s*.000075+1))/((s*.000318+1)))/10

    Can someone tell me what I am doing wrong? Admittedly new to Pspice.

    Thank you in advance.

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  • retiredEE
    +1 retiredEE 10 months ago in reply to AB_1719507089133

    The format is:
    E<name> <(+) node> <(-) node> LAPLACE { <expression> } = { <transform> }

    Your RIAA transform must be enclosed in braces just like your expression.

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  • AB_1719507089133
    0 AB_1719507089133 10 months ago in reply to retiredEE

    Thank you very much. I was able to access Property Editor and from there it was no problem. Problem solved.

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