IMPROVED NOISE SUPPRESSION VIA MULTILAYER CERAMIC CAPACITORS (MLCs) IN POWER-ENTRY DECOUPLING

A new decoupling technique is proposed for surface mounted designs that recommends using 0.1 µF MLCs as the circuit-level decoupling capacitors and 1.0 µF to 10 µF MLCs in place of the tantalum as the board-level power-entry capacitor. This combination of MLCs on each PCB coupled with a single system level tantalum or aluminum is probably an optimum arrangement; performance is enhanced, and cost is not increased. TECHNICAL INFORMATION In a typical power distribution system (Figure 1-a), the power-entry capacitor Cb, is a relatively large-valued capacitor near the power-entry point o