Issue link: https://resources.pcb.cadence.com/i/1180278
Using Differential Pairs in Allegro PCB Editor Learn more at Cadence Support Portal - https://support.cadence.com © 2019 Cadence Design Systems, Inc. All rights reserved worldwide. Page 3 Contents Purpose ....................................................................................................................... 4 Audience ...................................................................................................................... 4 Overview ...................................................................................................................... 4 Types of Differential Pairs ........................................................................................ 4 Differential Pair Terminology .................................................................................... 4 Creating a Differential Pair ........................................................................................... 6 Manual Creation of Differential Pairs ........................................................................ 6 Automatic creation of Differential Pairs .................................................................... 8 Creating Differential Pairs in Constraint Manager .................................................. 10 Auto Creation of Differential Pairs .......................................................................... 11 Differential Pair Calculator ......................................................................................... 12 Differential Impedance in Constraint Manager ........................................................... 14 Max Uncoupled Length .............................................................................................. 16 Tandem Routing ........................................................................................................ 17 Dynamic Phase Control for Differential Pairs ............................................................. 18 Resizing a Differential Pair ........................................................................................ 21 Examples ................................................................................................................... 22 Differential Pair Spacing ......................................................................................... 22 Troubleshooting ......................................................................................................... 26 Issue 1: Some Differential Pair Nets Do Not Slide Together .................................. 26 Issue 2: How to Remove Electrical Differential Pair Objects from Constraint Manager ................................................................................................................. 27 References ................................................................................................................ 28 Support ...................................................................................................................... 28 Feedback ................................................................................................................... 28