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Classification of power amplifier
electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier's efficiency
Power_amplifier_classes
Type of electronic amplifier
radio-frequency power amplifier (RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency (RF) signal into a higher-power signal
RF_power_amplifier
Audio amplifier based on switching
A class-D amplifier, or switching amplifier, is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic
Class-D_amplifier
Audio amplifier with power output sufficient to drive a loudspeaker
An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup
Audio_power_amplifier
Type of electronic amplifier
A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium
Valve_amplifier
Electronic device/component that increases the strength of a signal
an amplifier is measured by its gain: the ratio of output voltage, current, or power to input. An amplifier is defined as a circuit that has a power gain
Amplifier
Electronic circuit
A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load. The term usually
Linear_amplifier
Electronic audio amplifier
Class T was a registered trademark for a switching (class-D) audio amplifier, used for Tripath's amplifier technologies (patent filed on Jun 20, 1996)
Class-T_amplifier
Technical specifications and detailed information on the valve audio amplifier
in a finished amplifier) between class A (giving best open-loop linearity) through classes AB1 and AB2, to class B (giving greatest power and efficiency
Valve audio amplifier technical specification
Valve_audio_amplifier_technical_specification
Mean amplitude of a waveform in the time domain
greatly affects its characteristics of distortion and efficiency; power amplifier classes are distinguished by the operating point set by the DC bias. DC
DC_bias
Proprietary amplifier technology
Class XD (crossover displacement) is a proprietary and patented amplifier technology developed in-house by Cambridge Audio. First appearing in 2006 in
Class-XD_Amplifier
Type of electronic circuit
push–pull amplifier is more efficient than a single-ended class-A amplifier. The output power that can be achieved is higher than the continuous dissipation
Push–pull_output
Electricity to a loudspeaker for sound
Audio power is the electrical power transferred from an audio amplifier to a loudspeaker, measured in watts. The electrical power delivered to the loudspeaker
Audio_power
Electronic amplifier for musical instruments
amplifier receives an electric guitar's pickup-generated signal and shapes that signal's tone through a preamplifier and amplifies it through a power
Guitar_amplifier
Vacuum tube electronic amplifier that uses a single triode to produce an output
components subtracted. Single-ended amplifiers normally operate in Class A; push–pull amplifiers can also operate in Classes AB or B [citation needed] without
Single-ended_triode
Valve amplifier designed by David Theodore Nelson Williamson
The Williamson amplifier is a four-stage, push-pull, Class A triode-output valve audio power amplifier designed by David Theodore Nelson Williamson during
Williamson_amplifier
Numerical measures that characterize amplifier properties and performance
suitability of a particular amplifier for an intended use. The gain of an amplifier is the ratio of output to input power or amplitude, and is usually
Amplifier_figures_of_merit
amplifiers can be connected such that they drive a single floating load (bridge) or a single common load (parallel), to increase the amount of power available
Bridged and paralleled amplifiers
Bridged_and_paralleled_amplifiers
Audio amplifier with direct-coupled capacitorless output
of several amplifier classes, and typically have a push–pull output stage. Advantages of OCL amplifiers over capacitor-coupled amplifiers include Avoiding
OCL_amplifier
Brand of guitar amplifiers
Fender amplifiers are electric instrument amplifiers produced by the Fender Musical Instruments Corporation. The first guitar amplifiers attributed to
Fender_amplifier
Valve Amplifier (VVA) is software algorithm designed and sold by Diamond Cut Productions, Inc. for simulating the sound of various valve amplifier designs
Virtual_Valve_Amplifier
American audio equipment manufacturer
audio designer Nelson Pass and produces solid-state power amplifiers, preamplifiers, headphone amplifiers and related components aimed at the audiophile market
Pass_Labs
Beam tetrode vacuum tube
widely used in audio- and radio-frequency power amplifier applications. 807s were used in audio power amplifiers, both for public address and Hi-Fi application
807_(vacuum_tube)
Electromagnetic device
magnetic amplifier (colloquially known as a "mag amp") is an electromagnetic device for amplifying electrical signals. The magnetic amplifier was invented
Magnetic_amplifier
by the power amplifier. The combination of several laser amplifiers seeded by a common master oscillator is essential concept of the High Power Laser Energy
Laser_power_scaling
Type of valve amplifier
A valve audio amplifier (UK) or vacuum tube audio amplifier (US) is a valve amplifier used for sound reinforcement, sound recording and reproduction.
Valve_audio_amplifier
Electronic amplifier for musical instruments
A bass amplifier (also abbreviated to bass amp) is a musical instrument electronic device that uses electrical power to make lower-pitched instruments
Bass_amplifier
Characteristic quality of sounds from vacuum tube amplifiers
push–pull amplifier has a symmetric (odd symmetry) transfer characteristic. Power amplifiers are of the push–pull type to avoid the inefficiency of Class A amplifiers
Tube_sound
British audio equipment manufacturer
to audio design, ignoring specifications and power ratings as indicators of the quality of an amplifier. Naim's approach includes, but is not limited
Naim_Audio_amplification
Amplifier with loudspeaker for use with musical instruments
the performers and audience. Combination (combo) amplifiers include a preamplifier, a power amplifier, tone controls, and one or more speakers in a cabinet
Instrument_amplifier
Type of electronic audio manipulation
obtained an overdriven sound by turning up their vacuum tube-powered guitar amplifiers to high volumes, which caused the signal to distort. Other ways
Distortion_(music)
Guitar amplifier produced by Fender
section; the power amplifier section used a single cathode-biased 6V6 beam power tetrode necessarily in Class A operation. The amplifier had a single
Fender_Princeton
Danish company specializing in audio amplification apps
specialising in Class-D amplifiers for audio applications. In 1994 Karsten Nielsen began to write a Ph.D. dissertation "Audio Power Amplifiers Techniques Based
ICEpower
Norwegian audio hardware company
finished product was a 25 Watt power amplifier named "The 2 Channel Audio Power Amplifier", also called "The Otala Amplifier". They continued development
Electrocompaniet
Operational amplifiers have several applications, optimised for use with negative feedback. When positive feedback is required, a comparator is usually
Operational amplifier applications
Operational_amplifier_applications
Double-diffused MOSFET
field-effect transistor) used in amplifiers, including microwave power amplifiers, RF power amplifiers and audio power amplifiers. These transistors are often
LDMOS
Type of transistor amplifier
ground reference or a power supply rail), hence its name. The analogous field-effect transistor circuit is the common drain amplifier and the analogous tube
Common_collector
Loudspeaker that have built-in amplifiers
Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers. Powered speakers are used in
Powered_speakers
Topics referred to by the same term
Class E may refer to: Class E amplifier, a power amplifier class in electronics Class E addresses, in a classful network, a type of Internet Protocol
Class_E
Electronic circuit
in line-level audio preamplifiers and in the output stages of audio power amplifiers. The diamond follower was a natural development of the complementary
Diamond_buffer
U.S. information technology company
Monolithic Power Systems supports the electrification of transportation and manufactures class D Audio Amplifier products. Monolithic Power Systems operates
Monolithic_Power_Systems
Vacuum tube
designator for a beam power tube introduced by Radio Corporation of America in April 1936 and marketed for application as a power amplifier for audio frequencies
6L6
Output beam tetrode
high-power and low-distortion. Due to these characteristics, it is regularly used to replace 6550 tubes by end users seeking a guitar amplifier tone with
KT88
Topics referred to by the same term
Army Service Uniform An airspace class defined by the ICAO A power amplifier class A class of broadcast station in North America An electronic device conforming
Class_B
Highest transmissible power level
"Understanding Class-D amplifier power supply requirements | EE Times". EETimes. Retrieved 2016-10-28. The peak power that an amplifier can deliver to
Peak_power
Guitar amplifier
The Fender Champ was a guitar amplifier made by Fender. It was introduced in 1948 and discontinued in 1982. An updated version was introduced in 2006
Fender_Champ
Specific figure of merit in electronics
not hold for the upper end of the input power range, be it during measurement or during use of the amplifier. As a consequence, measured or simulated
Third-order_intercept_point
Guitar amplifier
Peavey 5150 is a vacuum tube based guitar amplifier made by Peavey Electronics from 1992 on. The amplifier was initially created as a signature model
Peavey_5150
CMOS amplifiers (complementary metal–oxide–semiconductor amplifiers) are ubiquitous analog circuits used in computers, audio power amplifiers, smartphones
CMOS_amplifier
Guitar amplifier
The AC30's characteristically "jangly" tone and increased power made it a favorite amplifier of guitarists in the British Invasion, including the Beatles
Vox_AC30
Device for electrically amplifying the power of an electrical radio frequency signal
A valve RF amplifier (UK and Aus.) or tube amplifier (U.S.) is a device for electrically amplifying the power of an electrical radio frequency signal.
Valve_RF_amplifier
American electronics engineer (1929–2016)
known for his contribution to the design of RF power amplifiers and the development of class E power amplifiers. Sokal was born in 1929 in Brooklyn. He was
Nathan_O._Sokal
amplifier that has about 1/2 of the rated input power of the transmitter's final amplifier stage. The secondary winding is in series with the power supply
Modulation_transformer
Amplified sound system for public events
mixing and signal processing systems, tens of thousands of watts of amplifier power, and multiple loudspeaker arrays, all overseen by a team of audio engineers
Sound_reinforcement_system
Audio power amplifier type
audio power amplifier, which omits an output transformer for the purpose of greater linearity and fidelity. Conventional vacuum tube amplifier designs
Output_transformerless
British producer of high-end audio equipment
players, and its core product range of amplifiers of various types (power, phono, headphone, integrated and pre-amplifiers). Other products have included headphones
Musical_Fidelity
Integrated audio amplifier
solid-state pre-amplifier and power-amplifier separates, Naim launched a low-powered integrated amplifier that embodies the qualities of its amplifiers, aimed
Naim_NAIT
Guitar amplifier series
The Mark Series is a line of guitar amplifiers designed and produced by California-based manufacturer Mesa/Boogie since 1972. The first "Boogies," as they
Mesa/Boogie_Mark_Series
Audio equipment manufacturing company
manufactures mono-block and stereo power amplifiers, multi-channel power amplifiers and stereo control amplifiers. In the early 1970s, Nelson Pass was
Threshold_Audio
Operational amplifier for audio applications
amplifier (op amp) for audio applications introduced by Signetics in 1979. The 5532 and the contemporary TL072 were the first operational amplifiers that
NE5532
the power handling of the speakers or the power output of the amplifier. This can be viewed as a somewhat deceptive marketing ploy, as the total power consumption
Total_system_power
US high-end audio equipment manufacturer
professional audio applications. The company manufactures audio amplifiers, preamplifiers, power-related products, digital-to-analog converters (DACs), streaming
PS_Audio
Guitar equipment manufacturer
California is a manufacturer of hand-built electric guitar amplifiers, speaker cabinets, power amplifiers, sound effects pedals and pedalboard accessories. The
Fryette_Amplification
DSP algorithms, class D power amplifiers and switch-mode power supplies. He holds several patents in the fields of digital audio and power conversion and
Bruno_Putzeys
Startup technique in electronics
the power supply rail. The same term has been used somewhat more generally for dynamically altering the operating point of an operational amplifier (by
Bootstrapping_(electronics)
Background operating conditions for electronics
control-grid voltage. In a typical Class A voltage amplifier, and class A and AB1 power stages of audio power amplifiers, the DC bias voltage is negative
Biasing
Phenomena in electronic circuits
load. It is most commonly seen in complementary, or "push-pull", class-B amplifier stages, although it is occasionally seen in other types of circuits
Crossover_distortion
Topics referred to by the same term
Class A may refer to: Class-A amplifier, a category of electronic amplifier Class A network, in Internet technology, a type of large network Class A television
Class_A
Prolofic Audio Amplifier Designer & Enthusiast
Nelson Pass (born June 27, 1951) is an American designer of audio amplifiers. Pass holds at least seven U.S. patents related to audio circuits. In 1974
Nelson_Pass
Modulation allowing for multiple signals on a line
requires a linear RF power amplifier which creates a design conflict between improving power efficiency or maintaining amplifier linearity. Compromising
Polar_modulation
Operational amplifier
The μA741 is an early operational amplifier (op amp) integrated circuit (IC), originally designed at Fairchild Semiconductor by Dave Fullagar and released
ΜA741
useful for power-amplifiers. The single amplifiers can be of any class. There may be some synergy between distributed class E/F amplifiers and some phase-matching
Distributed_amplifier
German audio equipment company
777 was very successful, Burmester wanted to bring the first hi-fi power amplifier with symmetrical signal routing on the market. This was a novelty for
Burmester_Audiosysteme
Dutch electronics company
electronics company known for its class-D audio amplifier modules. These employ a control method called Universal class D (UcD), invented by Bruno Putzeys
Hypex_Electronics
American high-end audio equipment brand
ML-3, a Class AB Power Amplifier with 2 x 200 Watts output power at 8 Ohms in a dual mono construction. ML-9, a Class AB Power Amplifier with 2 x 100 Watts
Mark_Levinson_Audio_Systems
Property that an increasing voltage results in a decreasing current
consumes power. Similarly, applying a voltage to the negative impedance converter below greater than its power supply voltage Vs will cause the amplifier to
Negative_resistance
Type of vacuum tube
vacuum tube constructed for medium power oscillator or class B or C amplifier applications. It is a medium-mu power triode with 300 watts CCS or 350 watts
833A
Line of electric guitar and bass amplifiers
The Portaflex is a line of amplifiers for electric guitars and bass guitars created by Ampeg and originally designed by Jess Oliver. Portaflex referred
Ampeg_Portaflex
Vacuum tube
audio power output pentode vacuum tube with ratings virtually identical to the 6V6 at 250 V. It was commonly used as an output audio amplifier in tube
6AQ5
Device that controls current between electrodes
occurs even in an idle amplifier due to the quiescent current necessary to ensure linearity and low distortion. In a power amplifier, this heating can be
Vacuum_tube
Electronic method of transmitting information with a carrier wave
Modern high-power AM transmitters (such as those used for AM broadcasting) are based on high-efficiency class-D and class-E power amplifier stages. Older
Amplitude_modulation
Topics referred to by the same term
1, a French biplane Aichi AB-1, a Japanese biplane Class-AB1 amplifier, a type of power amplifier AB1 in the AB postcode area AB1, the Athens Biennale
AB1_(disambiguation)
American audio equipment manufacturer
Ampeg ("amplified peg") is a manufacturer best known for its bass amplifiers. Originally established in 1946 in Linden, New Jersey by Everett Hull and
Ampeg
Vacuum tube (valve)
is typically found in guitar amplifiers. The EL34 is a pentode, while the 6L6, which delivers a similar range of power output, is a beam tetrode which
EL34
American audio equipment manufacturer
is defined by a dry "growl" and a quick reaction from the class H power amplifier. GK engineered the 200MB, which was the smallest and lightest 200W
Gallien-Krueger
Electromechanical device
Driving brushless DC torque motors or stepper motors in actuators Class D electronic amplifiers Switched capacitor filters Variable-frequency drives D.C. voltage
Chopper_(electronics)
Bipolar transistor configuration in electronics
327: Procedures for Output Filtering Lab — Section 4 ("Power Amplifier") discusses design of a BJT-Sziklai-pair-based class-AB current driver in detail.
Sziklai_pair
Electronic filter circuitry used in loudspeakers
cabinets, power amplifiers in consumer electronics (such as Hi-Fi, home cinema sound and car audio), and pro audio and musical instrument amplifier products
Audio_crossover
Functional parameter of electronic systems
in systems such as: The Class-D amplifier, an audio power amplifier with a switched-mode output. Various types of electric power conversion equipment: Boost
Switching_frequency
Single-grid amplifying vacuum tube having three active electrodes
high-power RF amplifiers in radio transmitters and industrial RF heating devices. In recent years, there has been a resurgence in demand for low-power triodes
Triode
American radio receiver manufacturer (1921–1956)
through the RF amplifier stage via an audio-frequency transformer, allowing that tube to also function as an audio-frequency amplifier. This technique
Crosley_Radio_(1921–1956)
means to greatly improve the efficiency of RF power amplifiers, which was quickly termed the "Doherty amplifier" (U.S. Patent 2,210,028). It was first used
William_H._Doherty
Process necessary for BJT amplifiers to work correctly
maximum possible value. The class-AB push–pull output amplifier circuit below could be the basis for a moderate-power audio amplifier. Q3 is a common emitter
Bipolar_transistor_biasing
Model of guitar amplifier
The Mesa/Boogie Mark IIC+ is a guitar amplifier produced by California-based manufacturer Mesa/Boogie as part of its Mark series. The Mark IIC+ was released
Mesa/Boogie_Mark_IIC+
Power pentode vacuum tube
vacuum tube of the power pentode type. It is used in the power-output stages of audio amplifiers, most commonly now in guitar amplifiers, but originally
EL84
Audio compressor
from vacuum tubes to solid-state technology. The limiter featured Class A amplifiers, input and output transformers, fast attack and release times, and
1176_Peak_Limiter
Type of home entertainment system
ensure that the speakers were of compatible impedance and power-handling for the amplifier. As well, the consumer would have to ensure that they purchased
Home_theater_in_a_box
Electronic circuit
generating power becomes more important at high power levels. Linear Class A amplifiers are at best 25 percent efficient. Push-pull Class B amplifiers are at
Frequency_multiplier
are still used today, mainly in high-power, high-frequency applications and also in boutique guitar amplifiers. Receiving tubes have heaters or filaments
List_of_vacuum_tubes
Circuit that makes capacitor act like a larger capacitor
application is in DC power supplies where very low ripple voltage (under load) is of paramount importance, such as in class-A amplifiers. Here the capacitance
Capacitance_multiplier
POWER AMPLIFIER-CLASSES
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POWER AMPLIFIER-CLASSES