From wall plug to nano circuit: power chips go hand-in-hand with SoC technology News & Analysis 11/14/2002 Post a comment The conversion from bus voltage to final nanoscale load often requires low voltages at hundreds of Amperes, says this prolific Fairchild product planner. The key to efficiency, he writes in the November 18th issue of Planet Analog magazine, may have a lot to do with power factor correction... Reno Rosetti also authored an online guest column (an opinion piece) on the prospects for putting power management under digital control.
Stabilizing voltage mode converters with ceramic output capacitors News & Analysis 11/14/2002 Post a comment Power supply designers have a variety of choices available when selecting output filter capacitors. This selection is typically steered by the initial design goals, whether it is lowest cost, smallest size, lowest ripple voltage, or transient load response. These Texas Instruments engineers say there's a lot of mileage to be gained from ceramics, like small size and low cost. Just watch that ESR, they advise.
Stabilizing buck converters with transconductance amplifiers News & Analysis 11/14/2002 Post a comment Synchronous buck converters have received great attention in low power, low voltage DC-DC converter applications due to their high efficiency. In this application note, International Rectifier engineers show how to stabilize buck converters using as transductance device as the error amplifier in the voltage regulation circuit. A transconductance amplifier, they point out, multiplies the difference of input voltage with a certain gain to generate a current into the output node. These guys offer t
Commercialization Issues of MEMS/MST/Micromachines: An Updated Industry Report Card Product News 11/13/2002 1 comment Like virtually all other electronic-industry segments, microelectromechanical Systems (MEMS) did not escape the economic slowdown of 2002. Roger Grace, President of Roger Grace Associates, presents a "report card" on the MEMS industry, comparing where it is now versus 2001, and explains the reasons certain MEMS parameters received the grades they did.
Flash memory defends its crown News & Analysis 11/11/2002 Post a comment Power consumption, speed, and reliability are exerting ever more influence on the future of the nonvolatile memory (NVM) industry, leading dozens of companies to explore new technologies.
UWB simplifies portable design News & Analysis 11/8/2002 Post a comment Because ultrawideband (UWB) communications rely on an unusual wireless technology and suit a wide range of products, designing UWB into a system raises a number of questions.
A Fast Algorithm to Decrease DDS Spurious Signals News & Analysis 11/7/2002 Post a comment Alain Bourdillon, from University de Rennes, France, presents a filtering algorithm, based on the SVD (singular value decomposition) of the Hankel matrix of the signal. This algorithm decreases the level of spurious signals in Direct-Digital Synthesizer (DDS) applications. The spurious free dynamic range improvement of the signal after processing can be as large as 40 dB and depends mainly on the length of the sequence processed and on the accuracy of the calculations performed inside the algori
PCB Design-Tool Progress Continues Slowly Design How-To 11/6/2002 Post a comment Compared to chip design-tool development, advancements in the PCB
design-tool arena are not very dynamic. TechOnLine's Jim Lipman
discusses why he thinks PCB tool development is so slow and what PCB
tool vendors need to do to address upcoming system-design problems.
Chipmakers vie to influence PDA market News & Analysis 11/5/2002 Post a comment Competition in the handheld market continues to heat up, with Texas Instruments Inc. supplying the first non-Motorola processor for PDAs built by Palm Inc., and NeoMagic Corp. promising to bring a radical new processing architecture to 3G handsets next year.