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posted in March 2008
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Under the Hood: Evolution of the smart phone
Teardown  
3/3/2008   1 comment
It is interesting to look at the different ways that HTC and Nokia, two companies that have very competitive and successful smart-phone offerings, arrived at their latest products. HTC used its background as a PDA manufacturer to create the TyTN 2, essentially incorporating phone functionality into a PDA. Nokia came into the smart-phone market from cell phones, so it needed to find ways to increase functionality without substantially increasing the size of its latest phone, the N95.
2.4 GHz RF transceiver for ZigBee/IEEE 802.15.4 and low-power wireless applications
News & Analysis  
3/3/2008   Post a comment
Texas Instruments Incorporated has introduced its second-generation ZigBee®/IEEE 802.15.4 radio-frequency (RF) transceiver designed for the 2.4 GHz unlicensed ISM (industrial, scientific, medical) frequency band.
50-channel positioning engine the first to simultaneously track GPS and GALILEO satellites
News & Analysis  
3/3/2008   Post a comment
A leading provider of GPS receiver technology, u-blox will perform live GALILEO satellite tracking demonstrations at the 2008 CeBIT trade show to be held in Hanover, Germany, March 4th to 9th on its revolutionary 5 A-GPS and GALILEO-ready chip.
Synchronous buck yields low power-loss, EMI in small package
Product News  
3/3/2008   Post a comment
International Rectifier introduced the iP2005A, a fully optimized power stage product for high current synchronous buck multi-phase converters used in gaming, computing and communications applications.
Improving multi-carrier PA efficiency using envelope tracking
Design How-To  
3/2/2008   Post a comment
This article describes a technique based on envelope tracking that has been proven to offer a dramatic improvement in efficiency, from typically low 20% for a class AB amplifier to mid 40%, while offering multiband performance.
SIGNAL CHAIN BASICS (Part 9): SAR Converter Operation Explored
Design How-To  
3/1/2008   1 comment
The Signal Chain Basics Series continues with a discussion of the successive-approximation converter (SAR) architecture
<<   <   Page 4 / 4


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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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