Grounding Technique Quells EMI from Fast Processors

• 作者: David G.Morrison
• 来源期刊: 电源世界
• 学科: 工学
• 关键词: PROCESSORS hardware addressed SHIELDING adding CLOCK UNTIL COMES APERTURE titled
• 年，卷（期）: 2003,（12）
• 页码范围: 61-62
• 页数: 2页
• 分类号: TP332

摘要

【正】 With microprocessor clock speeds rising above 1 GHz, theCPU’s heatsink comes under increasing scrutiny as a source ofelectromagnetic interference (EMI). Often, this problem isn’ taddressed until after the microprocessor has been designed inand the product is undergoing EMI tests. If EMI problems arediscovered at that point, they’re addressed with Band—Aid solutions,such as adding shielding hardware. Naturally, such fixesslow product development and add cost. Moreover, theymay be ineffective in future product spins with newer processors.