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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.
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