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Bright Idea Illuminates LED Standards
Published December 1, 2008, 6:04 am, ThomasNet
In a recent paper, NIST researchers proposed measurement method allowing manufacturers to obtain accurate, reproducible, and comparable measurements of LED brightness and color. NIST method leverages fact that optical and electrical characteristics of LED are interrelated and function of the LED's junction temperature Also allowing measurement of heat flow in/out of LED, method lets ...
Nujira touts PA efficiency advance in handsets
Published November 30, 2008, 5:45 pm, Microwave Engineering Online
LONDON — Power amplifier specialist Nujira (Cambridge, England) is claiming PAs in handsets that use its High Accuracy Tracking technology are twice as efficient during HSUPA transmissions, and 1.5 times as efficient during W-CDMA transmissions, than the same PA with a standard constant voltage (CV) supply as widely deployed in the industry today.
Researchers Report New Record for Wireless Base Station Power Amplifiers
Published November 27, 2008, 11:28 am, PhysOrg
(PhysOrg.com) -- When consumers use their cell phones, reception can depend on the strength of the signals coming to and from wireless base stations. Those base stations in turn depend on high-power amplifiers to extend their range - amplifiers that typically consume ten times more power than they generate, for a 10 percent efficiency rate.
UC San Diego reports record for wireless base station power amplifiers
Published November 26, 2008, 1:26 pm, UC Newsroom
Two wireless infrastructure manufacturers have already expressed interested in the findings.
Bright Idea Illuminates LED Standards
Published November 25, 2008, 6:28 pm, Newswise
Researchers at NIST have proposed a new, economical method to allow LED and lighting manufacturers to obtain accurate, reproducible, and comparable measurements of LED brightness and color.
Bright idea illuminates LED standards
Published November 25, 2008, 1:59 pm, PhysOrg
The lack of common measurement methods among light-emitting diode (LED) and lighting manufacturers has affected the commercialization of solid-state lighting products. In a recent paper, researchers at the National Institute of Standards and Technology proposed a new, economical method to allow LED and lighting manufacturers to obtain accurate, reproducible, and comparable measurements of LED ...
TI 1.5-A linear battery chargers maximize AC adapter and USB input power
Published November 24, 2008, 6:00 am, PR Newswire via Yahoo! Finance
Texas Instruments Incorporated introduced today four 28-V, 1.5-A linear charge management ICs with integrated FETs aimed at smart phones and other portable electronics. The bq2407x family of lithium-ion battery chargers allows an end-equipment to be powered directly from an external power source, even if the unit's battery pack is defective, fully discharged or absent.
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