Input and Output Impedance with Negative Feedback

How negative feedback affects the input and output impedance of op-amp circuits

[coolwinder]

This is very simplistic. What in the case feedback network has its non-ideal input impedance? What is you are not returning voltage but current?

[simpleidea]

Is it only for non-inverting feedback op amp?

[Arif-tztf]

Sir please help me out in voltage shunt feedback amplifier the gain of the amplifier with feedback is Vo/Is how it is possible that the gain is the ratio of voltage to the current

[ashishappu]

Sir can we know which university you teach