Introduction Miniaturization, integration of functionality, and the increase of clock speed are recognized business drivers in the electronics industry today. Consequences are the fast increase in power dissipation leading to higher heat fluxes, higher temperatures and larger temperature gradients. Handling these effects makes it more difficult to stay cost competitive, because … [Read more...]
Communication Network Power Efficiency Assessment, Limitations and Directions
Introduction Despite the slowdown in the communication industry, Internet traffic continues to grow rapidly, fueled by the explosion in data communications, mobile Internet, e-commerce, content rich applications, and multi-media services. Internet traffic has increased by approximately 80% yearly in each of the last three years, and will continue to grow at 60 - 80% annually … [Read more...]
Keep Cool by Sensing Current to Control Fans
Control of cooling fans has become increasingly popular as efforts are made to reduce system power consumption and mechanical fan noise. The purpose of including a fan is to reduce temperature and keep it as low as possible. Mean time to failure for a variety of systems increases rapidly as temperature elevates. This has brought about a wide choice of thermally based fan … [Read more...]
Opto-electronic Transceiver Modules, a System Design Perspective
Introduction Small Form Factor (SFF) optical transceiver packages for use at 1-2 Gbits/s data rates have been described by several authors [1-5]. These rely on dual miniature optical connectors such as the MT-RJ or the LC to provide optical-component case widths as small as one centimeter. Passive alignment of the optical fibers with the active optical devices is achieved with … [Read more...]
CFD Prediction of Electronic Component Operational Temperature on PCBs
Introduction The thermal design of today's electronic equipment relies significantly on the use of Computational Fluid Dynamics (CFD) software for the prediction of electronics operational temperature. In the early to intermediate product design phase, CFD analysis is used to select a cooling strategy and refine a thermal design by parametric analysis. In the final design … [Read more...]
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