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Topic: Amplifier

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In the News (Mon 21 Jan 19)

  Description datasheet search, AMPLIFIER datasheet, AMPLIFIER datasheets, AMPLIFIER data sheets ::: ALLDATASHEET :::
Amplifiers(845) Amplifier (24) AMPLIFIER  (12) AMPLIFIER   (10) AMPLIFIER    (8) Amplifier:(5) AMPLIFIERS (5) amplifier.
0.1- 6 GHz 3 V, 14 dBm Amplifier
category.alldatasheet.com /index.jsp?sSearchword=AMPLIFIER   (198 words)

  ESP Amplifier Basics - How Audio Amps Work
In the case of a speaker, the power amplifier must be capable of providing a voltage and current sufficient to cause the speaker cone(s) to move.
An amplifier - or an element of an amplifying device - is presented with the input signal, and compares it to a "small scale replica" of the output signal.
In many designs, one part of the complete amplifier circuit (usually the input stage) acts as an error amplifier, and supplies exactly the right amount of signal to the rest of the amp to ensure that there is no difference between the input and output signals, other than amplitude.
sound.westhost.com /amp-basics.htm   (3926 words)

  NationMaster - Encyclopedia: Class A amplifier
Amplifiers biased so that collector current is cut off during one-half of the input signal are classified class B. The dc operating point for this class of amplifier is set up so that base current is zero with no input signal.
A class A amplifier is defined as one which is biased to a point where plate current in all the output devices flows for the entire 360 degrees of an input cycle, at the full, unclipped output of the amplifier.
A class AB amplifier is one in which the grid bias is set so that plate current flows for more than half, but appreciably less that the full 360 degrees of the the input cycle, again measured at the full, unclipped output of the amplifier.
www.nationmaster.com /encyclopedia/Class-A-amplifier   (475 words)

  Instrument amplifier - Wikipedia, the free encyclopedia
An instrument amplifier is an electronic amplifier designed for use with an electric or electronic musical instrument, such as an electric guitar.
Amplifiers of this type, such as Marshall amplifiers, are used in a range of genres, including hard rock, metal, and punk.
In the 1960s and 1970s, high output power amplifiers were preferred for instrument amplifiers, especially for large concerts, because public address systems were generally only used to amplify the vocals.
en.wikipedia.org /wiki/Instrument_amplifier   (698 words)

 Amplifier - Wikipedia, the free encyclopedia
The relationship of the input to the output of an amplifier — usually expressed as a function of the input frequency — is called the transfer function of the amplifier, and the magnitude of the transfer function is termed the gain.
Amplifiers are commonly classified by the conduction angle (sometimes known as 'angle of flow') of the input signal through the amplifying device; see electronic amplifier.
Class AB amplifiers are a compromise between Class A and B, which improves small signal output linearity; conduction angles vary from 180 degrees upwards, selected by the amplifier designer.
en.wikipedia.org /wiki/Amplifier   (2074 words)

 Review: Chu Moy headphone amplifier
The solution to all of these problems is a headphone amplifier - an amp designed to connect between a headphone socket and/or line level output and a pair of headphones.
The circuit this amplifier uses, you see, was invented by a chap called Chu Moy, who published it here, for anyone to build or improve upon.
Amplifiers are meant to be "straight wires with gain"; this one pretty much is.
www.dansdata.com /cmoy.htm   (2689 words)

 Encyclopedia :: encyclopedia : Energy amplifier   (Site not responding. Last check: )
In nuclear physics, an energy amplifier is a novel type of nuclear power reactor, a subcritical reactor, in which an energetic particle beam is used to stimulate a reaction, which in turn releases enough energy to power the particle accelerator and leave an energy profit for power generation.
The amplifier could actually be used to transform long-lived waste (like plutonium) from conventional reactors into safer substances.
The energy amplifier uses a synchrotron accelerator to produce a beam of protons.
www.hallencyclopedia.com /Energy_amplifier   (404 words)

 Operational amplifier - Wikipedia, the free encyclopedia
An operational amplifier, usually referred to as an 'op-amp' for brevity, is a DC-coupled high-gain electronic voltage amplifier with differential inputs and, usually, a single output.
The amplifier's differential inputs consist of an inverting input and a non-inverting input and ideally the op-amp amplifies only the difference in voltage between the two.
This is done to achieve unconditional stability of the amplifier down to unity closed loop gain using non-reactive feedback networks and makes this type of internally compensated amplifier easier to use.
en.wikipedia.org /wiki/Operational_amplifier   (3112 words)

 [No title]   (Site not responding. Last check: )
An amplifier is a device which changes a small movement into a larger movement.
This relationship is known as the gain of the amplifier.
The most common type of amplifier is the electronic amplifier, commonly used in radio and television transmitters and receivers, hi-fi units, microcomputers and other electronic digital equipment, and guitar and other instrument amplifiers.
wikiwhat.com /encyclopedia/a/am/amplifier.html   (113 words)

Amplifiers in their simplest form are built around a single transistor.
In one type of single-transistor amplifier, known as a common-emitter circuit, a varying input voltage is fed to the base of the transistor, and the output appears at the transistor's collector; the ratio of the output voltage to the input voltage is called the voltage gain.
In a cascade, or multistage, amplifier, the output of the first amplifying device (transistor) is fed as input to the second amplifying device, whose output is fed as input to the third, and so on until an adequate signal amplification has been achieved.
www.factmonster.com /ce6/sci/A0803814.html   (352 words)

 amplifier - HighBeam Encyclopedia   (Site not responding. Last check: )
AMPLIFIER [amplifier] device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has a larger amplitude.
The most common types of amplifiers are electronic and have transistors or electron tubes as their principal components.
Usually, multistage amplifiers are not made of discrete components, but are built as integrated circuits.
www.encyclopedia.com /html/a/amplifie.asp   (522 words)

 "Li'l 4x4" Tube Amplifier - How It Works
The B+ for the output stage plates and screens are taken from the second capacitor, and the B+ for the preamp and phase inverter from the third capacitor in the filter.
The input signal to the amplifier is applied directly to the volume control pot, from whence it passes through a variable high-pass filter (the "Treble" control).
The non-inverting input (grid) of the differential input amplifier is used strictly for signal input.
www.dogstar.dantimax.dk /tubestuf/4x4howit.htm   (2665 words)

 C-7 TruTechnology Car Audio Amplifier - Car Audio and Electronics Magazine
Most amplifiers use one dual gain pot per two channels to adjust the level, so setting the gain in bridge mode is easy.
As mentioned earlier, the C-7 uses one gain pot per channel, and bridging the amplifier requires that both the left and right input (front or rear, whichever is being bridged) gains are set to exactly the same level.
This is not a problem with the amplifier, but a possible issue when it is connected to certain decks or signal processors.
www.caraudiomag.com /testreports/0311cae_tru_technology_c7_car_audio_amplifier   (2036 words)

 Amplifier   (Site not responding. Last check: )
Amplifier classes: Audio power amplifiers are classified primarily by the design of the output stage.
Because of this, class A amplifiers are large, heavy and run very hot.
All this is due to the amplifier constantly operating at full power.The positive effect of all this is that class A designs are inherently the most linear, with the least amount of distortion.
www.screensound.gov.au /glossary.nsf/Pages/Amplifier?OpenDocument   (731 words)

Some amplifiers' gain controls are used precisely like a volume control (one end of the potentiometer connected to ground, the other end connected to the pre-amp signal and the wiper connected to the amplifier's front end).
The size of the power wire is determined by the current the amplifier draws and the length of the wire (from the battery to the amplifier).
If the amplifier uses RCA type connectors and has balanced inputs, it likely uses the chassis ground as a reference (which is a testimony to the noise rejection abilities of a balanced input circuit).
www.angelfire.com /ab6/userper/amplifier.htm   (4318 words)

 amplifier - a definition from Whatis.com
An amplifier is an electronic device that increases the voltage, current, or power of a signal.
Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds.
Such amplifiers must generate minimal internal noise while increasing the signal voltage by a large factor.
whatis.techtarget.com /definition/0,,sid9_gci211558,00.html   (394 words)

 Crutchfield Advisor - Amplifiers - General Amplifier Installation Tips
Amplifier wiring kits contain power and ground cable, a thin piece of wire for the turn-on lead, a fuse or circuit breaker, and all the connectors you need.
Make sure the patch cords supplying the musical signal to the amplifier are kept well away from potential sources of noise, such as brake light wires or rear window defroster wires.
Installing an amplifier calls for a little more skill and creativity than installing a receiver or a pair of speakers in the factory locations.
www.crutchfieldadvisor.com /learningcenter/car/amplifiers_install_tips.html   (739 words)

 Audio power amplifier system with frequency selective damping factor controls (US5197102)
In a particular embodiment, an audio amplifier drives a load in the form of a sound producing loud speaker exhibiting a frequency variable impedance characteristic over a range of audio frequencies.
The amplifier is responsive to the reduced damping factor for increasing power to the load for enhancing the sound produced by the loud speaker.
A power amplifier having a frequency selective variable damping factor, said amplifier having an input, an output and a feedback circuit coupled therebetween, the amplifier for driving a load in the feedback circuit having an impedance which varies with frequency between a high frequency cut-off and a low frequency resonance about a selected frequency comprising:
www.delphion.com /details?&pn=US05197102__   (356 words)

 HeadWize - Project: A Pocket Headphone Amplifier by Chu Moy
The amplifier is ideal as a booster for power-conserving stereo sources such as portable CD players and for interfacing with passive EQ networks such as tone controls or a headphone acoustic simulator.
The pocket amplifier remained quiet when tested near an old elevator facility that was known for generating loud crackles in another, more susceptible design.
Figure A7a is the basic circuit, which comes from Stephen Lafferty's Headbanger amplifier design, except that the value of the current limiting resistor has been reduced from 330 ohms to 220 ohms to give a 20mA charging current with the 12VDC regulated supply.
headwize.com /projects/showfile.php?file=cmoy2_prj.htm   (3917 words)

 Understanding Car Audio Systems: The Amplifier   (Site not responding. Last check: )
The power amplifier's main job is to deliver a boosted, or "amplified," signal to the loudspeakers.
Therefore, except for small, lower-powered systems (10 to 20 watts per channel), which have the amplifier attached to the rear of the radio, most car audio amps will be located remotely from the faceplate, connected by a cable.
Amplifier output is typically measured in watts per channel, with a normal stereo system having two channels, left and right.
www.edmunds.com /ownership/techcenter/articles/44841/article.html   (1663 words)

 Crutchfield Advisor - Amplifiers - FAQ
To calculate the current draw of an amplifier, multiply the number of channels by the RMS watts per channel (a 2 channel amp rated at 300 watts RMS per channel would be 600 watts).
You'll notice that virtually all the amplifiers on our website and in our catalog are described as "Tri-way capable." That means you can attach a Tri-way crossover to a pair of stereo amplifier channels to produce three channels — two stereo channels for front speakers, and one mixed-mono channel for your sub.
Class A amplifiers are desirable for the high quality of their sound, but the design is not particularly suited to car applications because of inefficiency and high heat production.
www.crutchfieldadvisor.com /learningcenter/car/amplifiers_faq.html   (5540 words)

 iTrip Amplifier - Proof of Concept
The following is a proof of concept abstract (read: not instructions or definitive how-to) on the itrip amplifier using the schematic [link].
In the example circuit, the antenna, itrip, and + and - wires were connected to the amplifier using alligator clips.
Alternate solutions to amplify the itrip signal are also in the works.
www.binaryelysium.com /itrip_amp   (1583 words)

 Rockford Fosgate Punch P2002 2-channel car amplifier 50 watts RMS x 2 at Crutchfield.com
The TOPAZ circuit allows the amplifier ground to move with the source unit ground, creating a "noise elimination" zone just before the preamp section.
The actual amplifier reviewed by Crutchfield produced 64 watts RMS per channel at 4 ohms, and 258 total watts at 2 ohms.
The amplifier is rated at 50 watts RMS per channel at 4 ohms and 200 total watts at 2 ohms.
www.crutchfield.com /cgi-bin/ProdView.asp?print=Y&g=120&tab=detailed_info&i=575P2002&secure=off&s=0&cc=01   (680 words)

 CMRH Reviews: 'Amplifier' by Big Tent Revival
Before reading that, I thought using "Amplifier" as an album title left a mighty large pair of shoes to fill, and my first listen was a disappointment.
To me, amplifier implied a disc that was meant to be played loud, a disc that rocked, and this one just fell short.
This is one track where they most definitely cranked the amplifiers up a few notches, threw the drummer into overdrive, and just threw everything they had into a rocking finale.
www.christianmusic.org /cmp/cmrh/index.cgi?command=Display_Review&review_id=37   (419 words)

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