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[Moved]: Differences between Single stage and Two stage operational amplifiers

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Hi.

Can somebody explain differences between Single stage and Two stage operational amplifiers?

So, when we use single stage and when two stage and why?
 

Re: Differences between Single stage and Two stage operational amplifiers

The output from a single stage amplifier is usually insufficient to drive an output device.In other words, the gain of a single amplifier is inadequate for practical purposes. Consequently, additional amplification over two or three stages is necessary. To achieve this, the output of each amplifier stage is coupled in some way to the input of the next stage. The resulting system is referred to as multistage amplifier.
 

Re: Differences between Single stage and Two stage operational amplifiers

I know that two stage reduce high gain and high swing.. One stage only gain.. Maybe that is answer?
I need better explanation..

So, when we use single stage and when two stage and why?
 
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