OR you give the amplifier 1000x more gain than it needs and use feedback. Here the gain is set by the resistors and not the internal errors of the amplifier.
View attachment 203563
I would like to know how further stage would be kept in biased in linear region so that previous amplifier o/p swing will be tolerable to a limit so that it doesn't steer into another region? Are there any other special amplifier configuration to handle this?Most bipolar opamps have 3 stages. Each stage is biased to operate in it's linear region. In most opamps, the second stage is compensated for stability.
Assuming it has already properly biased to be in linear region with AC coupled from I/p , curious to know about behavior amplifier o/p swing tolerable to further stage to operating properly with less compromisation with linearity.So far I learned that for keep it input linear it must be coupled to amplifier such that it will be less than Vt. (Considerable bjt device)
Or consider for cmos with condition of I/p coupling far less than Vgs-vth .
Now question is
How linearity is maintained from one stage to another in process of archiving higher gain?
For eg : if suitable input is applied to first stage of amplifier unit let's assume it have considerable gain such that it will surpass our approximation that I/p must be far less than Vt, so how further stage keep in track so that it will more will have more gain than previous stage with less compromisation with linearity.
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