Reduce netlist with parasitic resistors

[camelot]

Hello,
during a parasitic extraction executed by DIVA, I obtain a lot of
parasitic resistors of the same kind. I noticed that a lot of it are
in series or in parallel. Does someone know if is possible to
automatically compute (during or after extraction) these resistors in
series or in parallel so I would obtain a netlist with less component
to be simulated?

Thank you,

Camelot

 

[Edward Kalenda]

Diva automatically reduces series and parallel resistors during
extraction. The exception is if they are on different layers. Is this
the case you are seeing? If so, can I assume you would like an option to
tell Diva to do network reduction across layers that use the same
resistor models?

On 28 Mar 2007 07:44:06 -0700, "camelot" <scosmo@tiscalinet.it> wrote:

Hello,
during a parasitic extraction executed by DIVA, I obtain a lot of
parasitic resistors of the same kind. I noticed that a lot of it are
in series or in parallel. Does someone know if is possible to
automatically compute (during or after extraction) these resistors in
series or in parallel so I would obtain a netlist with less component
to be simulated?

Thank you,

Camelot

 

[camelot]

Yes, the last case you mentioned is mine. Does this option exist?
It should be also interesting having an option able to do what Jivaro
tool do that is a general reduction of the complexity of the netlist
with an acceptable guarantee on the accurateness....

Camelot

 

[Edward Kalenda]

On 30 Mar 2007 04:11:49 -0700, "camelot" <scosmo@tiscalinet.it> wrote:

Yes, the last case you mentioned is mine. Does this option exist?
It should be also interesting having an option able to do what Jivaro
tool do that is a general reduction of the complexity of the netlist
with an acceptable guarantee on the accurateness....

Camelot

No, there is no such option. Nobody has ever asked that the inter-layer
mesh be reduced. You'll have to file an enhancement request or it will
never get done.

 

[camelot]

Forgive me,
but the reduction on the parasitics coming from the some layer is
automatic or you have to define something in the rule file?

Thank you,

Camelot