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Operating point of common emitter amp, common source amp, and the op amp-based amp

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please help to explain the concept of operating point and how it is achieved with a common emitter amp, common source amp, and the op amp-based amplifiers (differentiator, integrator, inverting, and non-inverting amplifiers).
 

Hello,

your question is too general to be answered in a forum.
A forum can´t replace school.

Btw:
I think there is more than plenty information here in this forum and even more in the internet.
In this forum: more than 500 threads that discuss the operating point and more than 50 with "operating point" in the headline.
Please go through these threads.
If there still are questions, then you are welcome to ask detailed questions by giving links to the documents you refer to.

Klaus
 

Basically, the operating point of a common emitter transistor, common source Mosfet or opamp amplifier is when the input is biased so that the output voltage is at about half the supply voltage so it can swing equally up and down. Half the supply voltage is 0V when the power supply is positive and negative.
 

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