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convertion multi striped devices to multiple instances

dwaraka

 I have mosfets and resistors placed as multi striped devices in schematic. I want to convert it to mulple instances.

for example

if the schematic has a nmos with width 100u and 10 stripes, I want it to be changed as 10 different instaces of 10u width connected in parallel.

And if there is a resistor with length 50u of 5 stripes, after the conversion it should have 5 resistors, each of length 10u length, connected in series.

Could any one please help me in writing a skill script for this.

Thanks

 

Parents

  • Vijith,

    I suspect there is a way of doing this with Hercules, given that there is a way of doing it with Diva and Assura (and I suspect PVS, although I've not checked) by ensuring you have comparison rules that look at the "stripe" parameter as well as w and l. If you really do have to modify the schematic, something along these lines should help (I just wrote this and it has had very limited testing):

     

    procedure(CCFconvertParamToIterated(cvId paramName)
  let((newName width m paramType)
    foreach(inst cvId~>instances
      m=dbGet(inst paramName)
      paramType=type(m)
      when(stringp(m) m=atoi(m))
      when(m && m!=1
        ;----------------------------------------------------------------
        ; Come up with new instance name
        ;----------------------------------------------------------------
        width=dbGetNameNumBit(inst~>name)
        rexCompile("[<:>]")
        sprintf(newName "%s<%d:0>"
          rexReplace(inst~>name "__" 0)
          width*m-1
        )
        if(stringp(paramType) then
          dbSet(inst "1" paramName)
        else
          dbSet(inst 1 paramName)
        )
        inst~>name=newName
        ; might need a call to CCSinvokeInstCdfCallbacks at this
        ; point to call callbacks if necessary.
        ; Solution 11018344 on http://support.cadence.com contains the code
      )
    )
    schCheck(cvId)
  )
)

     


    You'd call CCFconvertParamToIterated(geGetEditCellView() "m")

    or whatever the parameter is called. Hopefully it's clear enough that you can adapt it to meet your needs.

    Andrew.

Reply

  • Vijith,

    I suspect there is a way of doing this with Hercules, given that there is a way of doing it with Diva and Assura (and I suspect PVS, although I've not checked) by ensuring you have comparison rules that look at the "stripe" parameter as well as w and l. If you really do have to modify the schematic, something along these lines should help (I just wrote this and it has had very limited testing):

     

    procedure(CCFconvertParamToIterated(cvId paramName)
  let((newName width m paramType)
    foreach(inst cvId~>instances
      m=dbGet(inst paramName)
      paramType=type(m)
      when(stringp(m) m=atoi(m))
      when(m && m!=1
        ;----------------------------------------------------------------
        ; Come up with new instance name
        ;----------------------------------------------------------------
        width=dbGetNameNumBit(inst~>name)
        rexCompile("[<:>]")
        sprintf(newName "%s<%d:0>"
          rexReplace(inst~>name "__" 0)
          width*m-1
        )
        if(stringp(paramType) then
          dbSet(inst "1" paramName)
        else
          dbSet(inst 1 paramName)
        )
        inst~>name=newName
        ; might need a call to CCSinvokeInstCdfCallbacks at this
        ; point to call callbacks if necessary.
        ; Solution 11018344 on http://support.cadence.com contains the code
      )
    )
    schCheck(cvId)
  )
)

     


    You'd call CCFconvertParamToIterated(geGetEditCellView() "m")

    or whatever the parameter is called. Hopefully it's clear enough that you can adapt it to meet your needs.

    Andrew.

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