Issue link: https://resources.pcb.cadence.com/i/1534337
Remember: This general equation provides a conceptual understanding of PDN behavior. Simulation tools are essential for accurate analysis by way of Maxwell's Equations and optimization of power distribution networks in real-world designs. f Tips: Use the following to improve your layout: ɢ Utilize placement shortcuts like QuickPlace and the ROOM property to efficiently position components and prevent routing issues across split planes. ɢ Place decoupling and bypass capacitors adjacent to their intended pins and parts to ensure effective filtering, current delivery, and voltage rail stability. ɢ Prioritize capacitor placement close to their associated circuits to optimize their performance in providing necessary filtering and current. 4. Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) f Problem: High-speed signals are susceptible to EMI, which can degrade signal integrity and interfere with nearby circuits. Additionally, EMC standards require designs to limit emissions to prevent disruption in other devices. f Solution: Apply EMI constraints in OrCAD X design rule settings to ensure compliance with EMC standards. Techniques such as controlled impedance, shielding, and optimized ground plane layouts minimize EMI. f Tips: Use EMI/EMC verification tools to assist in layout practices, including ground plane isolation and proper trace routing techniques, to meet industry & regulatory standards: ɢ IEC - International Electrotechnical Commission ɢ CISPR - Comité International Spécial des Perturbations Radioélectriques - International Special Committee on Radio Interference ɢ FCC - U.S. Federal Communications Commission ɢ FAA - U.S. Federal Aviation Administration ɢ RTCA - American Radio Technical Commission for Aeronautics ɢ UL - Underwriter Laboratories ɢ ISO - International Organization for Standardization ɢ SAE - Society of Automotive Engineers ɢ IEEE - Institute of Electrical and Electronics Engineers ɢ MIL-STD 461 - U.S. military set of standards Managing These Issues with OrCAD X Using constraint-driven tools and having the ability to validate designs in real-time, makes it easy to streamline the process of managing these high-speed design problems. By proactively setting constraints and leveraging the OrCAD X simulation and verification features, designers can tackle high-speed issues upfront, resulting in more reliable designs and fewer prototype iterations. 11 www.cadence.com OrCAD X High-Speed Digital Design Guide