文档介绍：Seals and other Materials Shield Against
EMI Problems in Medical Devices
pliance with global EMC (patibility)
regulations is a major milestone in the development of new medical devices. Faster
running systems in smaller, lighter designs are more likely to offer problems with EMI –
ic interference. Clinical settings are increasingly filled with signals from
other medical electronics, computers, cell phones, etc. Consequently, pliance
standards are ing prehensive.
The European Union’s Medical Device Directive and its related standards (EN 60601-
1-2), are ing the world reference for EMC in this industry. Medical devices
meeting the European Norm are typically assessed by the FDA pliant with US
standards. The EN specs set levels for both emissions leakage from a medical device, as
well as assessing the device’s own immunity to EMI.
While medical electronics devices typically see longer service puters and
equipment, the approaches used for EMI shielding are similar. Noisy pc-board
components can be reduced by effective board layout and regulating chip speeds. But,
some form of shielding is often needed to pliance standards. Conductive seals
and other forms of improved EMI shielding materials are available in a wide array of
choices.
In medical equipment, shielding at the outer enclosure is the mon design
approach. Whether metal or metallized plastic, the ou