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What is meant by Amplification ?

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varma_cs012

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Hi,

Can anyone define the amplificaton ant different types of amplification ?

Thank You.

Varma.
 

rikie_rizza

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Amplification means a process to increase signal strength by means of amplitude. so if you amplified a signal the amplitude will multiply. say a dc signal 1mV amplify 100X becomes 100mV.

Type of amps are: instrumentation or differential amplifier, Inverting amplifier, buffer, and this and that just find a book talk about basic electronics, sub chapter amplifier...
 

Rexypoo

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When it comes to questions about operational amplifiers I like to refer to my textbook (it is a really good book, I recommend it to anyone looking for basics and examples) titled:
"Design with operational amplifiers and analog integrated circuits" by Sergio Franco.

The intro to this book states:
[An amplifier is a] device that accepts an externally applied signal, called input, and generates a signal called output such that output = gain × input, where gain is a suitable proportionality constant. A device conforming to this definition is called a linear amplifier to distinguish it from devices with nonlinear input-output relationships, such as quadratic and log/antilog amplifiers.

So in short amplification is an increase in signal level, usually as a multiple of the original signal.
 

Electronica

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amplication means to increase the amplitude of a signal where as there are two main types of signals i.e. voltage amplification and current amplification.
 

graciousparul

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hi,
Amplification means magnify an input signal to yield a significantly larger output signal. The amount of magnification (the "forward gain") is determined by the external circuit design as well as the active device.
 

anchor_mnit

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see amplification is to increase signal power so as to transmit it over some media or transmission line
 

pngzhi

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This means that take a weak signal and give a powerful one.
 

NicholasTok

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this will confirm answer all your questions about amplifies

https://en.wikipedia.org/wiki/Amplifier

do take notes of this electronic term for examples "Gain, Bandwidth, Efficiency, Linearity, Noise, Output dynamic range, Slew rate, Rise time, Settling time and ringing, Overshoot & Stability factor"

as all these terms will determine how good or bad the performance of the amplifier and configurations.
 

joe1986

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hi AVI,
Amplifiers are used to increase the voltage or power amplitude of signals. They have many applications.

AUDIO VOLTAGE amplifiers boost the amplitude of signals between the frequency range 20 Hz to 20 KHz. This is the range of human hearing.
They are often used as PRE-AMPLIFIERS before the main amplifier.

AUDIO POWER amplifiers provide the power necessary to drive loudspeakers. They also amplify a frequency range from 20Hz to 20 KHz.

INTERMEDIATE FREQUENCY (i.f.) amplifiers are used in radio receivers.
High frequency radio signals are changed to the lower intermediate frequency by a FREQUENCY CHANGER circuit.
The i.f in A.M. radios is about 455 KHz. In F.M. radios it is 10.7 MHz.

RADIO FREQUENCY amplifiers amplify a selected band of frequencies.
Radio frequencies extend from about 30 KHz up to several thousand MHz.
The band of frequencies is selected by a BAND PASS FILTER or a TUNING circuit.

WIDE BAND amplifiers are designed to amplify a very wide band of frequencies, say from a few Hertz up to several hundred MHz.

VIDEO amplifiers are used in television cameras, receivers, vcr's etc. The bandwidth extends from DC up to about 6MHz.

DIRECTLY COUPLED amplifiers have no coupling capacitors between stages so that they are able to amplify DC signals.

DIFFERENTIAL amplifiers have two inputs and amplify the DIFFERENCE between the two input voltages.
If both inputs are the same then there is no output from the amplifier.
If there is an interfering signal then it will be picked up by both inputs and will not be amplified.
OPAMPS are commonly used as differential amplifiers.
 

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