Impedance

This item analyzes and checks single-ended and differential impedance of target nets.

This item checks the followings:
  • Check the single-ended impedance.
  • Check the differential impedance (Characteristic, Zdiff, Zcommon).


    Figure 1.
  • Item: Enter sub item name. User can enter arbitrary name.
  • Net Group: Select target net groups to be tested. Allow multiple net groups.
  • Target Impedance: You can assign required impedance for main area and break in/out area.


    Figure 2. Break-In/Out Definition
  • Options: You can assign PIN/VIA Escape length and other options.
  • Pin Escape: Enter a radius of circular region around pins to be excluded for the rule check.
  • Via Escape: Enter a radius of circular region around vias to be excluded for the rule check.
  • Ignore trace shorter than: the trace shorter than this length will be ignored.
  • Ideal: Consider the reference plane as ideal plane during analysis.
  • Real: Analysis proceed by reflecting the shape of the reference plane.