Issue link: https://resources.pcb.cadence.com/i/1534337
Post-Route Verification and Analysis Design Rule Checks and Post-Layout Analysis In high-speed PCB design, verifying that your layout adheres to the defined constraints and is optimized for signal integrity is crucial. Design Rule Checks (DRCs) and post-layout analysis provide a final opportunity to catch issues before manufac- turing, ensuring that your design performs reliably under real-world conditions. Design Rule Checks (DRC) The DRC tool in OrCAD X continuously monitors the layout, ensuring that all defined constraints are met as you route traces and place components. The DRC flags any violations of spacing, impedance, and length constraints, enabling real-time adjustments and corrections. f Purpose: DRCs validate that every constraint defined in Constraint Manager is enforced, identifying impedance mismatches, spacing issues, length mismatches, and other rule violations. f Key Features: ɢ Real-Time Monitoring: As you work, the DRC actively checks against all design rules, providing immediate feedback for faster iteration. ɢ Customizable Reports: The DRC generates detailed reports that pinpoint exact locations of violations, making it easy to review and adjust design elements. Signal Integrity Analysis Sigrity X Aurora integrated within OrCAD X offers in-depth signal integrity analysis, particularly valuable for high-speed designs where even small layout changes can affect performance. It provides an integrated simulation environment that enables designers to evaluate and address signal integrity (SI) issues. f Purpose: Signal integrity simulations help designers visualize signal quality, analyzing issues like reflections, crosstalk, and timing mismatches in critical nets. ○Key Features: ■ Reflection and Crosstalk Analysis: Sigrity X Aurora simulates high-speed signals, showing reflections and crosstalk across adjacent traces, allowing designers to adjust trace spacing, widths, and routing as necessary. ■ Eye Diagram Visualization: Sigrity X Aurora generates eye diagrams for differential pairs and clock lines, providing a visual representation of signal quality and timing. This is particularly useful for verifying that high-speed signals remain clear and distortion-free. 21 www.cadence.com OrCAD X High-Speed Digital Design Guide