Issue link: https://resources.pcb.cadence.com/i/1526746
High-Speed Design Constraints High-speed design constraints are specific rules for managing signal timing, crosstalk, and other issues in high-frequency circuits. These constraints are critical for maintaining signal integrity in modern, high-speed designs. Examples include: f Controlled impedance routing f Length matching for differential pairs f Via stitching for return paths f Signal rise time management Understanding these constraint domains provides a foundation for effectively using the constraint manager. In the next section, we'll explore how to organize nets using net classes, net groups, and constraint regions, which are essential for applying these constraints efficiently in your PCB designs. Understanding Net Classes, Net Groups, and Regions in PCB Design In PCB design, net classes, net groups, and regions are powerful tools for organizing and managing design rules. Let's explore each concept and their applications. 1. Net Classes Definition: A net class is a group of nets that share similar electrical constraints within a specific domain (Physical, Spacing, or Electrical). Diagram showing different net classes (e.g., Power, Signal, Ground) with their specific rules applied Application: Use net classes when you need to apply specific rules to a group of nets within a particular domain. Benefits: f Simplifies rule application for similar nets f Allows for domain-specific constraints 8 www.cadence.com Part 1 of 5