7 TIPS for Better Power-Integrity Measurements

摘要

For power-integrity tests, users rely on oscilloscopes. However, with more precise requirements, measurement errors that approach the required measurement value are problematic. Every millivolt of measurement error is critical; for example, when measuring a 1.5-V power rail with 2% tolerance. In addition, high-speed digital signals and other sources can couple onto power rails, requiring gigahertz of bandwidth to identify. Below are seven tips on how to quickly and accurately characterize rail noise and identify coupled signals.