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Longman Dictionary of Contemporary English
▪ IC1 acts as the input buffer stage, and it is a simple operational amplifier non-inverting mode circuit.
▪ Note that the saturation potential differences are close to the supply e.m.f.s biasing the operational amplifier.
▪ Differentiators based on operational amplifiers do not suffer from drift.
▪ Most standard stereo power amplifiers operate in class-B.
▪ Another unusual feature in this price class: outputs that enable those wishing to upgrade their home theater with separate power amplifiers.
▪ In a power amplifier the load would normally be a 8ohm loudspeaker.
▪ There are connections for an external power amplifier or powered subwoofer.
▪ The power amplifier itself is almost totally performed on the chip and this makes construction very straight forward.
▪ The on/off switch on the front panel should only control the power amplifiers and display functions.
▪ Analysing the series-voltage case first, the open-circuit and loaded voltage gains of the open-loop amplifier are defined as and respectively.
▪ Below is a six-channel, 600-watt amplifier.
▪ Just another snooty $ 3, 000 vacuum tube amplifier, I thought.
▪ The changes might include a handicapped parking space or a phone voice amplifier.
▪ There is and always has been a yawning gap at the budget end of the amplifier market.
▪ There was no way the amplifier and these cables could live together.
▪ They stole a television, compact disc player, an amplifier and some speakers, worth a total of £900.
▪ Through an amplifier, the New York maintains its acoustic brightness and bluntly refuses to be anything other than a blank canvas.
The Collaborative International Dictionary

Amplifier \Am"pli*fi`er\, n. One who or that which amplifies.

Douglas Harper's Etymology Dictionary

1540s; agent noun from amplify. Electronic sense is from 1914; shortened form amp is from 1967. Alternative stentorphone (1921) did not catch on.


n. 1 Anything that amplify, or makes something larger or more intense. 2 (context electronics English) An appliance or circuit that increases the strength of a weak electricity signal without changing the other characteristics of the signal. 3 (context US music English) An amp, specifically a particular type of speaker housed in a portable encasement used to amplify voices and musical instruments at live performances.


n. electronic equipment that increases strength of signals passing through it


An amplifier, electronic amplifier or (informally) amp is an electronic component that can increase the power of a signal. An amplifier functions by taking power from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier modulates the output of the power supply based upon the properties of the input signal. An amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss.

An amplifier can either be a discrete piece of equipment or an electrical circuit contained within another device. Amplification is fundamental to modern electronics, and amplifiers are widely used in almost all electronic equipment. Amplifiers can be categorized in different ways. One is by the frequency of the electronic signal being amplified; audio amplifiers amplify signals in the audio (sound) range of less than 20 kHz, RF amplifiers amplify frequencies in the radio frequency range between 20 kHz and 300 GHz. Another is which quantity, voltage or current is being amplified; amplifiers can be divided into voltage amplifiers, current amplifiers, transconductance amplifiers, and transresistance amplifiers. A further distinction is whether the output is a linear or nonlinear representation of the input. Amplifiers can also be categorized by their physical placement in the signal chain.

Amplifier (Dance Exponents album)

Amplifier is an album by New Zealand band Dance Exponents (pre- The Exponents), released in 1986. The album peaked at #18 and spent 4 weeks on the New Zealand Album Chart. The CD version was released in 1992 with an alternative cover and two additional tracks but has since been deleted. In May 2013 Universal Music will re-release the album digitally for the first time in New Zealand in a remastered extended edition. The extended edition features the original LP cover and running order and adds three additional tracks, two from the CD release and one additional b-side. It also restores Worldwide Wireless to its full length after it was edited for the CD release.

Amplifier (disambiguation)

An amplifier is a device for increasing the power of an electrical signal. Amplifier may also refer to:

Amplifier (band)

Amplifier is an English rock band originating from Manchester. The band has released five albums and four EPs since its inception in 1999. Their music has been described as " Soundgarden, Tool, Black Sabbath, Oceansize and Pink Floyd taking copious amounts of mind-altering substances and venturing on a trip through time and space (to another dimension), and back again." Their music is characterised by guitarist Sel Balamir's effect pedals, Matt Brobin's complex drumming, extended heavy sections, atmospheric compositions and philosophical lyrics.

Their self-titled debut album, Amplifier, was released in 2004 by Music for Nations. Their second album, Insider was released in Europe in 2006 on the SPV label. Their third album, The Octopus, was released to fans in December 2010 ahead of a full release in January 2011. Their fourth album, Echo Street was released in 2013, and the fifth album, Mystoria, was released in September 2014. They are often cited as one of the most underrated bands of the UK's rock scene, although they retain a strong cult following around Europe.

Amplifier (Amplifier album)

Amplifier is the debut album of the Manchester alternative rock band Amplifier.

Originally released by Music For Nations on June 6, 2004, it was re-released by the German-based label SPV in May 2005 after the collapse of the former. The Music For Nations release came in two formats: jewel case with 10 tracks, and digipack with 13 tracks. Unlike normal special editions, the 13-track version's bonus tracks are in the middle of the album, apparently forming the "true" album as the band intended it. The SPV release contains a bonus EP with four additional tracks (all previously released) and videos of two songs from the original.

The critical reception of the album was generally positive, with comments such as:

"A British rock-scene altering record. Enjoy it in all its infinite glory" Kerrang!

"No other record this year will have the audacity to field such lofty ambitions, let alone have the skills to fulfil them" NME

Usage examples of "amplifier".

It was difficult to blanket the station without an amplifier helmet, but the only one available was suspect.

What if they had made some machine to shelter them, something more powerful than the giant amplifier the thrint patriarchs had built on Homeworld?

Chief Slave said the amplifier had been fully repaired, and he believed it.

He touched his hands to the head-bandages again, and looked over at the new amplifier helmet.

A little like the one that had slipped away during the disastrous experiment with the jury-rigged amplifier helmet, able to think without contemplating itself.

He cast another glace of longing and terror at the amplifier as he passed.

Ordinary amplifier helmets had little or no effect on an adult male thrint, able to shield.

She had no amplifier, but no matter: there was time for volume later on.

He had no doubt that, had he that very day plugged her guitar into an amplifier, he would have wept.

Christa was standing in front of a cheap amplifier, a light-green guitar in her hands.

The amplifier tubes finished heating, and the speakers hissed faintly.

Christa do the actual hook-up of the amplifier and the stereo, insisting that if she did not start learning about electronics immediately, she would be lost in rock and roll.

The notes rippled out of the amplifier, washed through the room like molten metal, hung in the air like stars.

Her boots crunched on pulverized glass as she stretched up on tiptoe to peer into the back of the amplifier head.

Christa picked up Ceis and threw the volume knobs of her amplifier full on.