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SPECCTRA: matched length THROUGH series resistors

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I need to match lengths for signals from the microprocessor to the SDDRAM chips. Unfortunately, some signals go through series resistors.

I have 3 senarios:
==================
1) Micro -------------------------> SDRAM
2) Micro --> resistor ------------> SDRAM

I know how to set up a class for senario #1, and to match the routing length. How do you set up Specctra to match senario #2 to #1, i.e. the total length from the micro to the SDRAM is equal regardless if it goes through a resistor or not?

Any help or tips are welcome!

thanks in advance, claudio


Originally posted in cdnusers.org by artaflex
  • archive

    Hi

    I had not faced like this problem !
    But as per my assumption

    Assign resistor spice model to component. Then define X net length.

    Hope it will work.


    Originally posted in cdnusers.org by naren_thesia
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