The great spirit analysis under the amplifying circuit:
1, why single power supply with dc bias circuit, and double power supply need not?
2, what is the function of capacitor C1?
3, the transfer function of the circuit how to calculate?
Thank you for the great god!!!!!

CodePudding user response:

LZ to find a general operational amplifier, the internal structure of the input stage, a differential circuit, two class B is vi +, vi -
Single power supply, you will be v + grounding, is equivalent to the triode grade be connect together, circuit cannot work

In double power supply, the ground potential is greater than the potential of negative power supply for certain, vi + \ vi - although the ground, but the potential certainly outweigh the negative power supply voltage, the circuit can work properly