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Amplifier

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude (magnitude of the voltage or current) of a signal applied to its input terminals…

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Overview

History

Theory of Operation

Properties

Negative feedback

Categories

Applications

Classification of amplifier stages and systems

Example amplifier circuit

Notes on implementation

Special types

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Amplifier

Nodes231
Edges230
Triples186
Avg. degree1.99
Density0.008658
Components1

How this topic connects Entity context

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Amplifier

Top relations

related to Function · 27
Amplifier → AC, AM, An, An AC, An RF, Automatic, Buffer, CCIR, Class, DC, Following, Frequently, Home, Line, No, Operational, Other, Power, Preamplifier, RF
related to Vacuum tubes · 16
Amplifier → After, American Telephone, Amesbury, Boston, Duplex, For, In, Lee De Forest, MA, Shreeve, Telegraph Company, The, The Shreeve, Today, Vacuum, Varley
related to Example amplifier circuit · 15
Amplifier → AB, AC, Bipolar, C1, DC, FETs, It, Q1, Q2, R1, R2, R7, R8, The, This
related to Transistors · 13
Amplifier → Atalla, Bell Labs, BJT, Dawon Kahng, Due, John Bardeen, Mohamed, MOSFET, The, They, Today, Walter Brattain, William Shockley
related to Negative feedback · 11
Amplifier → However, In, Indeed, Large, Negative, Noise, Non-feedback, Since, The, This, With
related to Video amplifiers · 7
Amplifier → Certain, EDTV, HDTV, SDTV, The, TV, Video
is a · 6
Amplifier → amplifier circuit which typically has very high open loop gain and differential inputs, amplifier designed primarily to increase the power available to a load, electrical two-port network that produces a signal at the output port that is a replica of the signal applied to the input port, imperfect realization of an ideal amplifier, last 'amplifier' or actual circuit in a signal chain, type of regenerative amplifier that can use the feedback between the transistor's source and gate to transform a capacitive impedance on the transistor's source to a negative re…
related to External links · 6
Amplifier → AES, Amplifier Anatomy, Archived, Part, PDF, Reinventing
related to Notes on implementation · 6
Amplifier → An, Any, Many, Negative, The, This
related to Operational amplifiers (op-amps) · 6
Amplifier → An, BJTs, FETs, Op, These, Though

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Important terminology

amplifiers output power signal used input gain feedback voltage use frequency current negative circuit audio distortion transistors may device devices

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Amplifieris aelectrical two-port network that produces a signal at the output port that is a replica of the signal applied to the input port0.90text
Amplifieris aamplifier designed primarily to increase the power available to a load0.90text
Amplifieris alast 'amplifier' or actual circuit in a signal chain0.90text
Amplifieris aamplifier circuit which typically has very high open loop gain and differential inputs0.90text
Amplifieris atype of regenerative amplifier that can use the feedback between the transistor's source and gate to transform a capacitive impedance on the transistor's source to a negative re…0.90text
Amplifieris aimperfect realization of an ideal amplifier0.90text
Amplifierpart ofthe output is fed back and added to the input in the opposite phase0.85text
the magnetic amplifierinstance ofother than specialized power devices0.80text
amplidyneinstance ofother than specialized power devices0.80text
for 40 yearsinstance ofother than specialized power devices0.80text
the Class-D amplifierinstance ofresulting in devices0.80text
transistorsinstance ofsuch as inherent capacitance between input and output of devices0.80text

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