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Measures with spectre syntax (OCEAN measure)

AnnaS
Hello. Just wondering if someone could be able to help me to use FindWhen measure for DC analysis with spectre syntax.

Here is  corresponding hspice sample which I am trying to convert:

.MEASURE vtsat_sp find VTH(MN2) when v(vg1)=0.2

.MEASURE idsat    find i(vd3)   when V(Vg1)=0.2
 

Thanks in advance.

Anna

 
Parents

  • Anna,

    I think you'd need to save the operating point data for various components during the transient (assuming it's a transient) by including:

    save *:oppoint sigtype=dev

    in the netlist (or including a file containing that).

    Then in OCEAN you can do:

    openResults("/path/to/results.raw")
    selectResult('tran)
    threshTime=cross(v("Vg1") 0.2 1 "either" nil nil)
    vtsat_sp=value(getData("MN2:vth") threshTime)
    idsat=value(getData("vd3:i") threshTime)

    Something like that anyway...

    You may have to be cautious about the case of the names. If you interactively try typing outputs() after doing the selectResult, you'll see what's present. You can also use outputs(?map nil) which will give all the names in simulator names - I'm not sure whether you're doing this from ADE or from a standalone netlist.

    Regards,

    Andrew.

Reply

  • Anna,

    I think you'd need to save the operating point data for various components during the transient (assuming it's a transient) by including:

    save *:oppoint sigtype=dev

    in the netlist (or including a file containing that).

    Then in OCEAN you can do:

    openResults("/path/to/results.raw")
    selectResult('tran)
    threshTime=cross(v("Vg1") 0.2 1 "either" nil nil)
    vtsat_sp=value(getData("MN2:vth") threshTime)
    idsat=value(getData("vd3:i") threshTime)

    Something like that anyway...

    You may have to be cautious about the case of the names. If you interactively try typing outputs() after doing the selectResult, you'll see what's present. You can also use outputs(?map nil) which will give all the names in simulator names - I'm not sure whether you're doing this from ADE or from a standalone netlist.

    Regards,

    Andrew.

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