EMI Filtering for High-Reliability Applications Amanda Ison AVX Corporation, 11144 Penrose St, Sun Valley, CA 91352www.avx.com Electromagnetic interference (EMI), or electrical noise, is generated by everything from cellphones to solar flares and can make accurate signal transmission as difficult as trying to have a clear conversation in a noisy room. To improve signal clarity in electronic circuits, device designers turn to EMI suppression filters. Effective EMI filtering is necessary for almost every modern electronic device, including devices that generate their own EMI, as well as devices that are sensitive to EMI within their environment, and is especially important in high-reliability applications that utilize lower-power signals and have strict signal fidelity demands. High-reliability EMI filters are designed to consistently meet or
High-Reliability Solid Tantalum Capacitors Bob Fairey AVX Corporation, One AVX Blvd, Fountain Inn, SC 29644www.avx.com Solid tantalum capacitors are among the most popular types of small, surface-mount capacitors for electronic applications across the consumer, automotive, aerospace, and medical device markets. This paper will provide some context on the development of tantalum capacitor technology and address issues frequently faced by users, including the need for low equivalent series resistance (ESR) in filtering applications and the need for the highest possible reliability and long-lifetime performance in aerospace and medical applications. Figure 2: The dielectric surface area of a tantalum capacitor anode compared to its finished size. Over the course of the following decades, tantalum capacitor technology evolved to include several form factors.