Stats

  • Replies 2
  • Subscribers 164
  • Views 14431
  • Members are here 0
More Content

How to fix impedance mismatch?

Anonymous
Anonymous

In constraint manager I set the value for impedance and make all nets close to certain tolerances.   Then I it auto route and have bunch of impedance mismatch DRCs

1)I thought its constraint driven tool, so it should have routed within the tolerance of impedance I specified.

2)How to fix impedance mismatch.  I try delay tuning, it didn't work. It just adds more delay. 

Parents
  • oldmouldy
    You need a High Speed option for the Autorouter to get it to support impedance, used to be called HP for the stand-alone router product, now part of PCB Router Option for Allegro PCB Designer, otherwise you will get the Min_Line_Width assigned to the net when autorouting.
Reply
  • oldmouldy
    You need a High Speed option for the Autorouter to get it to support impedance, used to be called HP for the stand-alone router product, now part of PCB Router Option for Allegro PCB Designer, otherwise you will get the Min_Line_Width assigned to the net when autorouting.
Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.