Understand and reduce dc/dc-switching-converter ground noise

摘要

Dc/dc-switching power converters are notorious for physically disrupting otherwise carefully designed systems and circuit schematics. These converters drive unwanted charge onto electri cal ground, causing false digital signals, flip-flop double clocking, electromagnetic interference, analog-voltage errors, and potentially harmful high voltages. As the complexity of these designs increases and applica tions become more densely populated, the physical-circuit implementation begins to play a critical role in the electrical integrity of the system. To address these issues, you need to learn how to reduce two major sources of ground noise.