Differential amplifier (d.a)

A device which accepts an input signal and producer an output (o/p) signal (s/l) proportional 2 d input (i/p), is called an amplifier. An amplifier which amplifier the difference between (betn) the 2 i/p signal is called differential amplifier. The differential amplifier configuration (config.) is very much popular and is used in variety of analog circuits (ckt). The diff. Amp is an essential an basic building block in modern ic amplifier.
The term ic means integrated circuit whr all the componentr r fabricated ön the same chip. Most of the ic's r produced by the monolithic process. In this process, all the active elements like transistor and all the passive elements like resistance,silicon. This is called silicon wafer or a substrate. Such a monolithic process make low cost mass production of ic's possible.
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