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OrCAD X Constraint Management Guide Part 5

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Differential Pair Advanced Physical Constraints The Differential Pair values are set as shown below. Then finally we have Vias set for all the Physical Constraint Sets as well. Notice how all the rules within the constraint sets are applied accordingly (seen below). Setting the physical and electrical rules for your differential pairs almost completes differential pairs for your designs. You need to assign spacing constraints to your differential pairs for them to be considered fully 'ready' for high-speed/complex layouts. We will cover the spacing constraints and space-to-space class constraints required for differential pairs. 57 www.cadence.com OrCAD X Constraint Management Guide

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