amplifier

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Wilson Electronics Wireless Amplifier Cradle Kit

When we reviewed the Wilson Electronics SignalBoost Cellular Amplifier earlier this year, we were impressed with how significantly it boosted our cell phone reception in areas with patchy coverage. Where previously we struggled to get a consistent signal, the SignalBoost made it possible to make a call. Yet as useful...

Tags: Telecom & Utilities, Cellular phones, Wi-Fi, Nothing, cord, amplifier, Cradle Kit, phone

Product reviews 2007-12-04

Quantum?Dot?Based Photonic Devices

Adopting nanometer-sized semiconductor particles, called quantum dots, in the active regions of photonic devices provides the characteristics specific to 3-dimensional quantum effects. This will greatly improve the performance of photonic devices in many respects. This paper is developing quantum-dot lasers and quantum-dot optical amplifiers through joint research conducted with the...

Tags: Device, Fujitsu Ltd., Amplifier, Laser, Modulation, Semiconductors, Hardware

White papers 2007-10-01

Philosomatika.Com.Radio (widget)

Start listening to the best Goa Trance and psy-trance has to offer. For the best performance, use a high-speed 'net connection, a high powered amplifier and many huge, thumping speakers, then turn it up to 11. This version is the first release on CNET Download.com.

Tags: Amplifier, Igor Woestenburg, Performance Management, Human Resources, Workforce Management

Software downloads 2007-07-27

Swans HiVi Multimedia Speakers

Big, small, noisy, or clean, the market is flooded with choices for external computer speakers. Unfortunately, even a great set of computer speakers will often have about as much design flare as an office pencil sharpener. The Swans S3W HiVi speaker system didn't blow us out of our seat with...

Tags: Swans S3W HiVi, speaker, amplifier

Product reviews 2007-07-25

Photos: Top 10 reviews of the week

Here are CNET Reviews' 10 favorite items from the past week, including new Samsung and Canon cameras, a cell phone signal amplifier, a Fujitsu notebook and an iPod speaker.

Tags: amplifier, Canon Inc., Fujitsu Ltd., speaker, Samsung Electronics Co. Ltd., notebook, camera, cell phone, Apple iPod, photograph, telephone

Image galleries 2007-03-17

Wilson Electronics SignalBoost Cellular Amplifier

If you live or work in an area with poor cell phone reception or you drive through too many dead zones during your commute, you know how frustrating it can be to place a simple call. And though you might think a cell phone signal booster is the answer to...

Tags: Cellular phones, Wilson Electronics SignalBoost, telephone, amplifier, cable, cell phone

Product reviews 2007-03-13

Philips HTS6500

By combining a DVD player, a receiver, and speakers into a single product, home-theater-in-a-box systems HTIBs simplify the process of purchasing and installing a home theater. Although a full-blown home-theater system is often the best solution for optimal sound quality, setting up five speakers and a subwoofer--let alone a full-scale...

Tags: Home entertainment, Consumer electronics, TV & Home Theater, DVD, Network technology, TVs, Philips HTS6500, speaker, Philips Electronics N.V., video

Product reviews 2006-07-20

Impedance Optimization of Linearizer to Suppress Intermodulation Distortion in 2.45 GHz SiGe WLAN Power Amplifier

The authors have designed a linear SiGe bipolar power amplifier with an on-chip varactor diode linearizer. This linearizer effectively improves the nonlinearity of the RF Power Amplifier PA. The power amplifier exhibits P1dB of 24 dBm, with a PAE of 31%, and power gain of 17 dB under 3.3V power...

Tags: Diode, Optimization, Amplifier

White papers 2006-03-06

A High Linearity, High Efficiency WiMAX Power Amplifier Using SiC MESFETs

This paper describes the results of a broadband, high linearity, high efficiency power amplifier for WiMAX basestation applications in the 3.3 - 3.9 GHz band. Using SiC MESFETs, a single-stage power amplifier has been designed that provides a significant increase in performance, providing 17% drain efficiency, 1.5% EVM, and 3dB...

Tags: Amplifier, WiMAX, Wi-Fi, Wireless, Semiconductors, Hardware

White papers 2006-03-02

OFDM Link Performance With Companding for PAPR Reduction in the Presence of Non-Linear Amplification

Use of companding for Peak-to-Average-Power Ratio PAPR control is explored for a link involving a non-linear transmit power amplifier with Orthogonal Frequency Division Multiplexing OFDM. Specifically, the objective of the study was to determine if companding using u-law compression/expansion at the transmitter/receiver, respectively, provides end-to-end performance gains relative to a...

Tags: Georgia Institute Of Technology, Performance, Transmitter, Amplifier, OFDM, Performance Management, Wireless, Human Resources, Workforce Management

White papers 2006-02-02

Advanced Design Methods of Doherty Amplifier for Wide Bandwidth, High Efficiency Base Station Power Amplifiers

This paper has proposed advanced design methods of Doherty amplifier for high efficiency base station power amplifiers with wide bandwidth. First, the paper develops Doherty amplifier with uneven power drive which is provided more input power to the peaking cell than the carrier cell for full power operation and appropriate...

Tags: Bandwidth, Amplifier, Cell, Design Method

White papers 2005-10-18

Slowing light down to 245 meters per second!

Several weeks ago, I told you about how Swiss researchers were able to control the speed of light both up and down. Today, I want to share with you the results obtained by other scientists at the University of California, Berkeley, which have used a laser amplifier to slow light...

Tags: laser

Blog posts 2005-10-08

The Performance of OFDM-SDMA Systems With Power Amplifier Non-Linearities

Amplifier nonlinearities affect drastically the performance of Orthogonal Frequency Domain Multiplexing OFDM systems. In this paper, the effects of amplifier nonlinearities is evaluated in OFDM with Space-Division-Multiple-Access SDMA.This paper shows that nonlinear power amplifier reduced dramatically the performance of multiple-antennas OFDM systems. The introduction of an array antenna system in...

Tags: Performance, Amplifier, Mobile Communication, OFDM, Performance Management, Cellular Phones, Wireless, Human Resources, Workforce Management, Consumer Electronics, Personal Technology

White papers 2005-08-25

Envelope Tracking Power Amplifier With Pre-Distortion Linearization for WLAN 802.11g

The Envelope Tracking ET system improves the Power-Added Efficiency PAE of a power amplifier by superimposing the envelope signal at the drain so that the RF transistor is consistently operated in a high efficiency region. This technology is especially suitable for high Peal-Average-Ratio PAR signals like the OFDM 802.1la/g system...

Tags: IEEE 802.11g, WLAN, Amplifier, Envelope Tracking System, Wi-Fi, Wireless LANs, Wireless, LANs, OFDM, Networking

White papers 2004-11-04

Next-Generation Architectures

This paper summarizes a new application technology in advanced optical transmission amplifier development and a series of successful field-trials for "hut-skipping" line architecture using hybrid Raman/Erbium-Doped-Fiber-Amplifiers EDFA. The trials were conducted to show that the application for hut-skipped ultra long-haul ULH at 10-40 GB/s mixing over 1600 km linear field...

Tags: Network, Amplifier, Line Architecture, Knowledge Management, Business Intelligence, Networking, Enterprise Software, Software, Data Management

White papers

TriQuint Designs Power Amplifier 2X Faster and More Accurately Using Visual System Simulator

TriQuint's Wireless Communications Operation provides products and technology to drive the growth of the cellular handset, portable WLAN device, and wireless basestation markets. The challenge was to design an EDGE/GSM power amplifier for a cellular handset. It was essential to accurately characterize the power amplifier's circuit performance at the system...

Tags: Software, Microsoft Visual SourceSafe, Amplifier, TriQuint, AWR, VSS 2006, Tools & Techniques, Cellular Phones, Wi-Fi, Wireless, Management, Consumer Electronics, Personal Technology

Case studies

Additional Resources

2008 Audi A8 L W12

Photo gallery:2008 Audi A8 L W12The 2008 Audi A8 L W12 rests in a premier echelon of cars that combine extreme luxury with exceptional driving performance, cars that make it difficult to decide whether you'd rather be reclining in the back seat while a chauffeur drives or up there where...

Tags: Digital music, Digital media, subwoofer, Audi A8, Audi AG, Bang & Olufsen, car, MP3

Product reviews 2008-07-24

Polk PSW111 Compact Powered Subwoofer - Black

The Polk Audio PSW111 isn't just a very good compact subwoofer, it's a excellent match with the brand's RM and SurroundBar speaker systems. Not that the PSW111 wouldn't jell with other Polk speakers, or those of any other manufacturer, for that matter, but its prime directive is to fill in...

Tags: Polk Audio PSW111, sub, SurroundBar 50

Product reviews 2008-07-23

2008 Honda Odyssey Touring

Photo gallery:2008 Honda OdysseyAlthough Honda claims a major update for its 2008 Honda Odyssey minivan, the results look to us like a minor facelift, just a little work around the eyes and mouth but the same old body. The front of the car exhibits some modern touches around the headlights...

Tags: Odyssey, Honda Motor Co., navigation system

Product reviews 2008-07-16

Parrot DS1120 Wireless Hi-Fi Speaker System

Parrot, a French company, makes a growing number of stereo Bluetooth speaker systems, most of which we've reviewed favorably. Parrot has a few new offerings for 2008, including the DS1120 ($280), a compact two-speaker system that resembles a set of stylish computer speakers.The identical speakers measure 6 by 5 by...

Tags: Wi-Fi, speaker, Bluetooth

Product reviews 2008-07-15