Simulation Analysis and Theoretical Calculations in Negative Feedback Amplifier Circuit

The paper applies the block diagram for simulation analysis and theoretical calculations of series negative voltage feedback amplifier circuit which is designed by operational amplifier.The same results indicate: 1) closed-loop gain and open-loop gain to meet basic relationship;2) the stability of feedback is consistent with the theory and output resistance decreased;3) the feedback coefficient is approximately equal to the reciprocal of the closed-loop gain in deep negative feedback conditions,which confirmed elementary conclusions in negative-feedback amplifier quantitatively.