Amplifier (2492 bytes)
1: ... of the transfer function is termed the [[gain]]. Amplifiers are typically utilized over a specific range of ...
2: See also: [[low noise amplifier]].
4: ...ital equipment, and guitar and other [[instrument amplifier]]s.
6: ...the [[fluidic triode]]. There are also mechanical amplifiers, such as the automotive [[servo]] used in [[brak...
8: ...pair of eight-[[ohm]] stereo loudspeakers) of the amplifier could be a collector or emitter voltage (with res...

Feedback amplifier (906 bytes)
1: ...nown as '''negative feedback amplifier''' is an [[amplifier]] which uses a [[feedback network]], generally fo...
6: ...in electronics are circuits, based on operational amplifiers.
8: One way to model negative feedback amplifiers is the [[asymptotic gain model]].

Williamson amplifier (1093 bytes)
1: ...e first examples of a [[high fidelity]] [[audio]] amplifier.
3: The Williamson amplifier used [[negative feedback]] coupled with a special...
7: The basic amplifier was designed to use GEC L63 Triodes as phase inve...
11: D.T.N. Willamson, The Williamson Amplifier - A collection of articles reprinted from Wireles...

Class AB amplifier (1220 bytes)
1: [[Class A amplifier]]s tend to have very low distortion when used wit...
3: [[Class B amplifier]]s tend to be efficient but suffer from high dist...
5: ... devices are active concurrently over part of the amplifiers range.
7: Such a circuit behaves as a class A amplifier in the region where both devices are in the linea...
11: ''See also'': [[Class AB1 amplifier]]

Valve amplifier (6242 bytes)
1: ... as a '''tube amplifier''' or ''[[vacuum tube]] [[amplifier]]'' (in [[American English]]), is a device for el...
3: ...stor]] amplifiers for economic reasons, but valve amplifiers remain popular for guitar amplification and for ...
5: ...th the circuit topology and circuit design of the amplifier, than to the use of valves rather than transistor...
7: ...he main active components. However, today, valve amplifiers (at least for Hi-Fi applications) are mostly the...
9: ...subsets of enthusiasts consider that "pure" valve amplifiers shall not use anything except valves as active d...

Class A amplifier (2074 bytes)
1: ...is topic has already been covered in [[electronic amplifier]]. This may well merit its own article, but check...
3: ...such as a gain stage of an [[electronic amplifier|amplifier]] is said to be in '''Class A''' if the device is...
5: This contrasts with [[Class B amplifier|class B]] where (typically a pair of devices oper...
13: ... many more complex circuits, including many audio amplifiers and almost all [[op-amps]]
17: *[[Electronic amplifier#Class C|Class C amplifier]]

Energy amplifier (3381 bytes)
1: In [[nuclear physics]], an '''energy amplifier''' is a novel type of [[nuclear power]] reactor, ...
9: ...the nuclear weapons fuel cycle — the energy amplifier cannot be used as a basis for creating weapons, s...
11: ...meltdown]] or explosion cannot happen, making the amplifier an inherently safer design.
15: ...r 500 years to the level of [[coal]] [[ash]]. The amplifier can actually be used to transform long-lived wast...
17: ...er have all been demonstrated. Building an energy amplifier requires only some [[engineering]] effort, not fu...

Magnetic amplifier (531 bytes)
1: ...een almost superseded by the [[transistor]]-based amplifier, except in a few extremely demanding military app...

Differential amplifier (1095 bytes)
1: ... Given two inputs A and B, a perfect differential amplifier gives an output O:
7: ...input of a differential amplifier, a single-ended amplifier results.
9: ...ommon arrangement for implementing a differential amplifier is the [[long-tailed pair]], which is also usuall...

Pre amplifier (396 bytes)
1: ...gests, is an [[amplifier]] which precedes another amplifier.
3: The second amplifier is typically a [[power amplifier]] (power amp). In this example, the job of the pr...

Buffer amplifier (1559 bytes)
1: A '''buffer amplifier''' is one that provides ''buffering'' between one...
3: ...th a lower impedance level. The interposed buffer amplifier prevents the second circuit from loading the firs...
5: If the voltage is transferred unchanged, the amplifier is a '''unity gain buffer'''.
7: ...mply by connecting the output of an [[operational amplifier]] to its inverting input, and using the non-inver...
9: Other unity gain buffer amplifiers include the [[bipolar junction transistor]] in c...

Bridged amplifier (682 bytes)
1: ...both outputs. This is similar to a [[push-pull]] amplifier.
3: ...put out. This is often an option on stereo power amplifiers for audio to increase the power available for a ...

Bridged amplifier (689 bytes)
1: ...both outputs. This is similar to a [[push-pull]] amplifier.
3: ...put out. This is often an option on stereo power amplifiers for audio to increase the power available for a ...

Electronic amplifier (20049 bytes)
1: ...will always produce some waste heat. An idealized amplifier can be said to be "a piece of wire with [[gain]]"...
3: ...mitations of the components used to implement the amplifier, and the efficiencies that can be realised.
5: ...id complicating the picture too much. Such exotic amplifiers are often used for [[Microwave|microwave]] or ot...
7: ==Amplifier Classes==
8: Amplifier circuits are classified as A, B, AB and C for [[a...

Operational amplifier (18501 bytes)
1: An '''operational amplifier''' or '''op-amp''' is an electronic circuit modul...
3: ...og computer]]s. In this sense a true operational amplifier is an ideal circuit element. The real ones we us...
23: ...mount of voltage applied to power the operational amplifier, i.e. Vs+ and Vs- in the above diagram. This all...
29: *audio and video [[preamplifier|pre]]-[[amplifier]]s and [[buffer]]s
31: *[[differential amplifier]]s

Optical amplifier (4762 bytes)
1: In [[telecommunication]], an '''optical amplifier''' is a device that amplifies an [[optical]] [[si...
3: == Doped fiber amplifiers ==
5: '''Fiber amplifiers''' are optical amplifiers which use a [[dopant|doped]] [[optical fiber]], ...
6: ...lectrical amplification takes place, this type of amplifier is well suited for a wide variety of applications...
8: Because this type of amplifier does not require extraordinary frequency ([[wavel...

FERRACTOR amplifier (502 bytes)
1: ... [[vacuum tube]] or [[transistor]] [[electronic]] amplifiers.

Audio amplifier (391 bytes)
1: ...''[[audio]] [[amplifier]]''' is an [[electronic]] amplifier that works with audio frequencies.
3: ...in a [[personal computer]] contains several audio amplifiers, as does every stereo sound system.

Instrumentation amplifier (652 bytes)
1: ''You may be looking for [[instrument amplifier]], as used for amplifying musical instruments. Th...
5: ...mentation amplifier''' is a type of [[operational amplifier]] that has been specifically designed to have cha...

Instrument amplifier (6511 bytes)
1: ...trumentation amplifier]], a type of [[operational amplifier]].''
4: [[Image:amphead.jpg|thumb|right|An amplifier head]]
6: An '''instrument amplifier''' is an [[electronic amplifier]] designed for use with an electric or electronic...
10: [[Image:comboamp.jpg|thumb|right|Two combo amplifiers]]
13: ... and loudspeaker enclosures together forming an ''amplifier stack''.

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