Using Differential Pairs in Allegro PCB Editor
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To remove differential pair definition from the SIGNAL_MODEL
1. Choose Analyze > SI/EMI Sim > Model.
2. If a window about DC nets pops up and prompts you to continue, select Yes.
3. In the Signal Model Assignment form, select the device in the form or the
component in the canvas.
4. Select Edit Model.
If the differential pair is electrically defined, the right-hand column will show DiffPair
Mate pins next to the Wire column.
5. Select one of the two pins. The IBIS Device Pin Data form will open.
6. Under the Differential Pair Mate type, select the pull-down arrow and choose
None.
7. Select OK.
8. If additional differential pairs are defined on the model, select another pin from
the DiffPair Mate column and repeat steps 5-7.
9. Select OK in the IBIS Device Model Editor form. The differential pairs will now
be removed from Constraint Manager.
References
Refer to Cadence Support Portal for any help. For more help, refer to the 'Related
Solutions' section below the PDF. The "Tips for using Differential Pairs in Allegro"
application note can also be searched with the document title on
https://support.cadence.com.
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