Multilayer ceramic capacitors (MLCCs) are commonly used on printed circuit board (PCB) power distribution networks (PDN) for decoupling purposes. However, an MLCC can act as a source to excite PCB vibrations due to noise ripples on the power rail. In this letter, four types of equivalent source configurations are studied and compared to represent the excitation of an MLCC on a PCB driven by power rail noise. The corresponding source values are extracted at test-vehicle PCB resonance frequencies. The investigation of the four equivalent source types involves a comparison between simulated and measured PCB vibration velocity responses triggered by MLCC deformation across an audible frequency band. The advantages of each equivalent source are discussed for specific application scenarios.


Electrical and Computer Engineering

Publication Status

Early Access

Keywords and Phrases

Electromagnetic compatibility; Equivalent source type; Force; Frequency measurement; multilayer ceramic capacitor (MLCC); printed circuit board (PCB) vibration; Resonant frequency; source extraction methodology; Velocity measurement; Vibration measurement; Vibrations

International Standard Serial Number (ISSN)

1558-187X; 0018-9375

Document Type

Article - Journal

Document Version


File Type





© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Jan 2024