News tagged with amplifier
Giant optical gain in a rare-earth-ion-doped microstructure
Prof. Markus Pollnau and co-workers at the MESA+ Institute for Nanotechnology at the University of Twente (The Netherlands) have developed a rare-earth-ion-doped optical amplifier with performance comparable to semiconductor ...
Jan 12, 2012 |
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Finnish team devise nanomechanical microwave amplifier with near least possible noise generation
(PhysOrg.com) -- A team of Finnish physicists has developed a novel way to amplify a microwave signal that unlike other amplifiers, produces noise that is just barely above that which is necessary due to the ...
Dec 15, 2011 |
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Dutch team provides alternative to optical semiconductor amplifiers
Researchers at the University of Twente's MESA+ research institute have developed a material capable of optical amplifications that are comparable to those achieved by the best, currently available semiconductor ...
Nov 18, 2011 |
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EU-funded project improves global data transmission
Researchers have developed two new components that could help Europe meet some of its most pressing communication challenges in optical amplifier research.
Sep 15, 2011 |
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Novel optical amplifier without the noise
Researchers in Sweden have succeeded in delivering an optical amplifier capable of amplifying light with extremely low noise. The study is published in the journal Nature Photonics.
Jul 08, 2011 |
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NXP brings GaN technology mainstream
At IMS2011 this week, NXP Semiconductors N.V. is showcasing a live demo of its next-generation products based on Gallium Nitride (GaN) technology.
Jun 07, 2011 |
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World's first GaN HEMT T/R module operating in the C-Ku band
Fujitsu Laboratories today announced that it has successfully developed the world's first transmitter/receiver (T/R) module using gallium-nitride (GaN)high electron mobility transistor (HEMT) technology that ...
Jun 06, 2011 |
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DOCOMO develops compact multi-band power amplifier
NTT DOCOMO today announced that it has developed a prototype power amplifier for six frequency bands between 1.5 GHz and 2.5 GHz in a form factor smaller than multiple single-band power amplifiers conventionally ...
May 20, 2011 |
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Mayan buildings may have operated as sound projectors
(PhysOrg.com) -- A team of archaeologists from Mexico say buildings built by the Maya people could have served as projection systems and amplifiers to deliver sounds over relatively large distances.
Other Sciences / Archaeology & Fossils
Dec 21, 2010 |
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Swede broadcasts music from his stomach
A Swedish man broadcast music from his stomach for several hours via a mini audio system, but said he was disappointed by the sound quality.
Nov 26, 2010 |
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Lastest graphene research could lead to improvements in bluetooth headsets and other devices
Researchers at the UC Riverside Bourns College of Engineering have built and successfully tested an amplifier made from graphene that could lead to more efficient circuits in electronic chips, such as those ...
Nanotechnology / Nanomaterials
Oct 18, 2010 |
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Triple-mode transistors show potential: Researchers introduce graphene-based amplifiers
(PhysOrg.com) -- Rice University research that capitalizes on the wide-ranging capabilities of graphene could lead to circuit applications that are far more compact and versatile than what is now feasible ...
Oct 13, 2010 |
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Fujitsu develops GaN HEMT power amplifier featuring world's highest output in millimeter-wave W-Band
Fujitsu announced the development of a power amplifier using gallium nitride (GaN) High Electron Mobility Transistors (HEMT) that has achieved the world's highest output performance of 1.3W for wireless communications ...
Oct 06, 2010 |
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Researchers develop world’s first blue-violet ultrafast pulsed semiconductor laser with 100 watt output
Tohoku University and Sony researchers have succeeded in developing a blue-violet ultrafast pulsed semiconductor laser with dramatically improved peak laser beam output levels that are 100 times that of the ...
Jul 21, 2010 |
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Fujitsu Develops Gallium-Nitride HEMT Amplifier Featuring World's Highest Output in the C-Ku Band
Fujitsu today announced the development of an amplifier based on gallium-nitride (GaN) high electron mobility transistor (HEMT) technology, which features an output of 12.9W - more than twice the output of ...
May 28, 2010 |
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Amplifier
Generally, an amplifier or simply amp, is a device for increasing the power of a signal.
In popular use, the term usually describes an electronic amplifier, in which the input "signal" is usually a voltage or a current. In audio applications, amplifiers drive the loudspeakers used in PA systems to make the human voice louder or play recorded music. Amplifiers may be classified according to the input (source) they are designed to amplify (such as a guitar amplifier, to perform with an electric guitar), the device they are intended to drive (such as a headphone amplifier), the frequency range of the signals (Audio, IF, RF, and VHF amplifiers, for example), whether they invert the signal (inverting amplifiers and non-inverting amplifiers), or the type of device used in the amplification (valve or tube amplifiers, FET amplifiers, etc.).
A related device that emphasizes conversion of signals of one type to another (for example, a light signal in photons to a DC signal in amperes) is a transducer, a transformer, or a sensor. However, none of these amplify power.
For more information about Amplifier, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
