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TechRepublic Resources
- 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
- 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
- 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
- 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
- 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
Additional Resources
- Amplifier-Loudspeaker Matching Formula (xls)
- In terms of power, we compare the power of amplifier watts by the power handling capacity watts of the loudspeaker. Power capacity of the loudspeaker is measured by watts but actually the power of a speaker is measured by sound production capacity, which is measured by decibel dB. dB does...
- Tags: Speaker, Loudspeaker, Watt, NonameHifi High End Audio, dB
- Software downloads 2008-08-04
- A High Average-Efficiency SiGe HBT Power Amplifier for WCDMA Handset Applications
- The linearity of a Silicon-Germanium SiGe HBT Power Amplifier PA is analyzed with the help of a power-dependent coefficient Volterra technique. The effect of emitter inductance is included and the dominant sources of nonlinearity are identified. A dynamic current biasing technique is developed to improve the average power efficiency for...
- Tags: W-CDMA, Technique, IEEE, Productivity, Cellular Phones, Consumer Electronics, Personal Technology
- White papers 2005-02-01
- A Comparision of OFDM and Non-Linear SC/FDE Signals: Non-Linear Amplification
- One of the most influential parameters in nowadays wireless communications market is the battery lifetime, especially for mobile devices. In contrast to OFDM Orthogonal Frequency Division Multiplexing, SC/FDE single carrier transmission with frequency domain equalization allows to apply signal formats with constant envelope, such as CPM Continuous Phase Modulations or...
- Tags: Battery, OFDM, Engineering, Wireless
- White papers 2005-05-31
- Amplify (zip)
- *** Calculates sound pressure level SPL, power consumption, and other details related to specific audio system setups. *** Compatible with the following types of systems: mono, stereo, 3-channel front stage, 3-channel surround, 4-channel surround, 5-channel surround, 6-channel surround, and 7-channel surround. *** Allows entering amplifier power rating, speaker distance, speaker...
- Tags: Speaker
- Software downloads 2008-02-08
- Wideband Envelope Elimination and Restoration Power Amplifier With High Efficiency Wideband Envelope Amplifier for WLAN 802.11g Applications
- High efficiency Power Amplifiers PAs are critical in portable battery-operated wireless communications because they can dominate the power consumption. The traditional Envelope Elimination and Restoration EER system improves the efficiency by driving the Radio Frequency RF transistor in switch mode (Class D/E mode) with a constant amplitude phase signal and...
- Tags: Radio Frequency, IEEE 802.11g, Radio, WLAN, Network Technology, Advertising & Promotion, Networking, Marketing
- White papers 2005-10-26
- 15 W Vacuum Tube Amplifier
- blog rootAmplifier GF-20MCModel: GF-20MC Power: 20W Speaker: 6.5” Control: Mic control: Mic Input,MicVolume,Tone,Reverb Master Control:Length,Depth,CD/Tape,CD Volume,HeadphoneGuitar NormalVolume,Gain,DriveVolume,Bass,Middle,Treble,Reverb,Output Featues: Mic Input,Reverb,Overdrive,CD Input,Headphone,Output Dimensions: in Weight: 4.8 KG
- Tags: info@..., Mic
- Discussion threads 2006-08-13
- getting a black screen
- i m using windows-xp from last three month....and yesterday, i m not able to reach windows-xp configration screen or loging screen..getting black screen. how i can reslove this problem...i would be very thankful to you...RegardskawaljeetMonitorDo you have power on your monitor? Do you use an amplifier to hook up to...
- Tags: Monitors & displays, kawaljeet.singh@...
- Discussion threads 2007-04-09
- COMPATABILITY
- CAN AC CURRENT AND DC CURRENT RUN TOGATHERYESDC and Ac can be sent/transmitted over one pair of wires, however filters must be used to seperate them for their individual uses. Most often, AC on top of a DC level is refered to as ripple and is undesirable. It's...
- Tags: bjaaron7317@...
- Discussion threads 2006-06-24
- Front Panel Audio Connection for T1840
- I recently had to change the motherboard out of an emachines T1840, now the front panel connection don't match up. I managed to find the left and right audio for the headphone jack black and red skinny pair but there is a thinck black wire leftover, also the sound is...
- Tags: headphone
- Q&A 2006-09-01
- Automat (zip)
- Automat is a polyphonic stereo subtractive audio unit software synthesizer. Features include: subtractive synthesis, anti-aliased oscillators with hard-sync, filters and amplifier with ADSR and AHDSR, modulators with tempo sync, waveshaper/eq, stereo-delay with filter and tempo sync, modulated spatial effect, poly-, uni-sono, and legato-mode, random preset generation, build in MIDI learn....
- Tags: Software, Alphakanal, Automat, Tools & Techniques, Management
- Software downloads 2006-12-19
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