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<p><b>New page</b></p><div>[[File:Op-amp_symbol.svg|Op-amp symbol|thumb]] '''Differential amplifier'''<br />
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A '''differential amplifier''' is a type of [[electronic amplifier]] that amplifies the difference between two [[input voltage]]s but suppresses any voltage common to the two inputs. It is a fundamental building block in [[analog circuits]] and is widely used in [[operational amplifier]]s, [[instrumentation amplifier]]s, and various other applications.<br />
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==Operation==<br />
The differential amplifier operates by taking two input signals, typically denoted as V1 and V2, and producing an output voltage that is proportional to the difference between these inputs. The basic equation for the output voltage (Vout) of a differential amplifier is:<br />
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: Vout = A(V1 - V2)<br />
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where A is the differential gain of the amplifier.<br />
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==Types of Differential Amplifiers==<br />
There are several types of differential amplifiers, including:<br />
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* [[Long-tailed pair]]<br />
* [[Current mirror]]<br />
* [[Operational amplifier]]<br />
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==Applications==<br />
Differential amplifiers are used in a variety of applications, including:<br />
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* [[Audio amplifier]]s<br />
* [[Analog-to-digital converter]]s<br />
* [[Data acquisition]] systems<br />
* [[Sensor]] signal processing<br />
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==Advantages==<br />
Some of the key advantages of differential amplifiers include:<br />
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* High [[common-mode rejection ratio]] (CMRR)<br />
* Improved noise immunity<br />
* Better linearity compared to single-ended amplifiers<br />
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==Design Considerations==<br />
When designing a differential amplifier, several factors need to be considered:<br />
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* [[Input impedance]]<br />
* [[Output impedance]]<br />
* [[Gain bandwidth product]]<br />
* [[Power supply rejection ratio]] (PSRR)<br />
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==See Also==<br />
* [[Operational amplifier]]<br />
* [[Instrumentation amplifier]]<br />
* [[Common-mode rejection ratio]]<br />
* [[Analog circuit]]<br />
* [[Electronic amplifier]]<br />
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==Related Pages==<br />
* [[Operational amplifier]]<br />
* [[Instrumentation amplifier]]<br />
* [[Common-mode rejection ratio]]<br />
* [[Analog circuit]]<br />
* [[Electronic amplifier]]<br />
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[[Category:Electronic amplifiers]]<br />
[[Category:Analog circuits]]<br />
[[Category:Electronics]]<br />
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