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How to add drain/source area & perimeter "ad as pd ps" of MOSFET in creating Spectre netlist in Analog Design Environment?

Paulux

Hello,

 May I ask how to add drain/source area & perimeter "ad as pd ps" of MOSFET in creating Spectre netlist in Analog Design Environment? (i.e. e.g. x1 (d g s sub) nmos w=2u l=2u ad=5p as=5p pd=5u ps=5u). Since I only have one NMOS & PMOS instances with symbol, hspice & spectre views only and their CDF can only generate x1 (d g s sub) nmos w=2u l=2u. I can only find the parameters for calculating "ad as pd ps" from the design rule document and do not have any PDK file. Would you please help to show how to add these "ad as pd ps" in details or step-by-step?

If I post this message to wrong forum, could you please kindly help to move to proper forum and let me know?

Thank you very much for your help & kindness.

Parents

  • Thanks a lot. Andrew.

    Since this is old process that did not provide PDK, I need to make it myself unluckily.

    Some people suggest that I can write the component parameters inside CDF(shown below). In fact, the generated spectre nestlist does not automatically calculate but just lists out the equations of ad, as, pd & ps respectively
    (e.g. N1 (D G S B) ne2 w=nw l=nl as=0.48*(nw) ad=0.48*(nw) ps=0.96+2*(nw) pd=0.96+2*(nw))
    The above constants are taken from layout design rule documents manually.

    Could you please recommend/show step-by-step how to setup automatic calculation of ad,as,pd,ps without using fixed constant equations(shown above) so that this MOSFET ne2 could be used as an universal device for any foundry process with attaching different file of these constants?

    Thank you very much for your help & kindness.

    The CDF data is shown below.

     cdfCreateParam( cdfId
           ?name           "model"
           ?prompt         "Modelname"
           ?defValue       "ne2"
           ?type           "string"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "m"
           ?prompt         "Multiplier"
           ?defValue       ""
           ?type           "string"
           ?display        "artParameterInToolDisplay('m)"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "l"
           ?prompt         "length"
           ?defValue       "pPar(\"ln\")"
           ?type           "string"
           ?callback       "nMOSl()"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "w"
           ?prompt         "width"
           ?defValue       "pPar(\"wn\")"
           ?type           "string"
           ?callback       "nMOSw()"
           ?parseAsCEL     "yes"
       )
         cdfCreateParam( cdfId
           ?name           "ad"
           ?prompt         "Drain diffusion area"
           ?defValue       "0.48*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('ad)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "as"
           ?prompt         "Source diffusion area"
           ?defValue       "0.48*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('as)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "pd"
           ?prompt         "Drain diffusion periphery"
           ?units          "lengthMetric"
           ?defValue       "0.96+2*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('pd)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "ps"
           ?prompt         "Source diffusion periphery"
           ?units          "lengthMetric"
           ?defValue       "0.96+2*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('ps)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "nrd"
           ?prompt         "Drain diffusion resistor squares"
           ?defValue       "(0.16+0.22/2)/iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('nrd)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "nrs"
           ?prompt         "Source diffusion resistor squares"
           ?defValue       "(0.16+0.22/2)/iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('nrs)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )

    The simulation information is shown below.
    cdfId->simInfo->spectre = '( nil
           modelParamExprList nil
           optParamExprList  nil
           opParamExprList   nil
           stringParameters  nil
           propMapping       nil
           netlistProcedure  ansSpectreDevPrim
           otherParameters   (model)
           instParameters    (w l as ad ps pd nrd nrs rsc rdc ld ls m trise region)
           termOrder         (D G S B)
           termMapping       (nil D d G g S s B b)
           namePrefix        "M"
           componentName     mos2
           current           port
       )
    cdfId->simInfo->hspiceD = '( nil
           termMapping       (nil D \,D G \,G S \,S B \,B)
           netlistProcedure  hspiceDCompPrim
           instParameters    (m w l ad as pd ps nrd nrs rdc rsc off Vds Vgs Vbs dtemp geo)
           otherParameters   (model)
           componentName     nmos
           termOrder         (D G S B)
           dataAccessMap     (IDC((D "id")))
           propMapping       (nil vds Vds vgs Vgs vbs Vbs)
           namePrefix        "M"

Reply

  • Thanks a lot. Andrew.

    Since this is old process that did not provide PDK, I need to make it myself unluckily.

    Some people suggest that I can write the component parameters inside CDF(shown below). In fact, the generated spectre nestlist does not automatically calculate but just lists out the equations of ad, as, pd & ps respectively
    (e.g. N1 (D G S B) ne2 w=nw l=nl as=0.48*(nw) ad=0.48*(nw) ps=0.96+2*(nw) pd=0.96+2*(nw))
    The above constants are taken from layout design rule documents manually.

    Could you please recommend/show step-by-step how to setup automatic calculation of ad,as,pd,ps without using fixed constant equations(shown above) so that this MOSFET ne2 could be used as an universal device for any foundry process with attaching different file of these constants?

    Thank you very much for your help & kindness.

    The CDF data is shown below.

     cdfCreateParam( cdfId
           ?name           "model"
           ?prompt         "Modelname"
           ?defValue       "ne2"
           ?type           "string"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "m"
           ?prompt         "Multiplier"
           ?defValue       ""
           ?type           "string"
           ?display        "artParameterInToolDisplay('m)"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "l"
           ?prompt         "length"
           ?defValue       "pPar(\"ln\")"
           ?type           "string"
           ?callback       "nMOSl()"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "w"
           ?prompt         "width"
           ?defValue       "pPar(\"wn\")"
           ?type           "string"
           ?callback       "nMOSw()"
           ?parseAsCEL     "yes"
       )
         cdfCreateParam( cdfId
           ?name           "ad"
           ?prompt         "Drain diffusion area"
           ?defValue       "0.48*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('ad)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "as"
           ?prompt         "Source diffusion area"
           ?defValue       "0.48*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('as)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "pd"
           ?prompt         "Drain diffusion periphery"
           ?units          "lengthMetric"
           ?defValue       "0.96+2*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('pd)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "ps"
           ?prompt         "Source diffusion periphery"
           ?units          "lengthMetric"
           ?defValue       "0.96+2*iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('ps)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "nrd"
           ?prompt         "Drain diffusion resistor squares"
           ?defValue       "(0.16+0.22/2)/iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('nrd)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )
       cdfCreateParam( cdfId
           ?name           "nrs"
           ?prompt         "Source diffusion resistor squares"
           ?defValue       "(0.16+0.22/2)/iPar(\"w\")"
           ?type           "string"
           ?display        "artParameterInToolDisplay('nrs)"
           ?parseAsNumber  "yes"
           ?parseAsCEL     "yes"
       )

    The simulation information is shown below.
    cdfId->simInfo->spectre = '( nil
           modelParamExprList nil
           optParamExprList  nil
           opParamExprList   nil
           stringParameters  nil
           propMapping       nil
           netlistProcedure  ansSpectreDevPrim
           otherParameters   (model)
           instParameters    (w l as ad ps pd nrd nrs rsc rdc ld ls m trise region)
           termOrder         (D G S B)
           termMapping       (nil D d G g S s B b)
           namePrefix        "M"
           componentName     mos2
           current           port
       )
    cdfId->simInfo->hspiceD = '( nil
           termMapping       (nil D \,D G \,G S \,S B \,B)
           netlistProcedure  hspiceDCompPrim
           instParameters    (m w l ad as pd ps nrd nrs rdc rsc off Vds Vgs Vbs dtemp geo)
           otherParameters   (model)
           componentName     nmos
           termOrder         (D G S B)
           dataAccessMap     (IDC((D "id")))
           propMapping       (nil vds Vds vgs Vgs vbs Vbs)
           namePrefix        "M"

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