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1) In log scale bode plot, 0 Hertz doesn't exist. It is called as DC gain because the frequency is too low so that we can act like we have dc signal in this frequency range. If you have a signal with 0 hertz in frequency domain what do you have in time domain? A signal starts from -infinite and...
1) It is the open loop gain of amplifier, we never use the opamp in open loop configuration. There are always negative feedback branch consists of resistor, capacitors etc. The gain is determined by that feedback branch. Do you know the negative feedback?
2) Due to the negative feedback, the...
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