Discussion and Simulation of Differential-Common Collector Circuit of Electrical Properties of the Negative Feedback

Through block diagram analysis,the paper conducted a theoretical calculation of differential-common collector voltage series negative feedback amplifier circuit.The EWB simulation results showed that the relative error of the theoretical calculation and simulation of the open-loop and closed-loop voltage gain were 0.142% and 0.150% respectively.It is consistently coincidence.The simulation of the open-loop and closed-loop voltage gain were obvious that meet the basic requirement of relationship of the feedback amplifier.The state of the openloop input and output resistance theory and simulation indicates that the relative error were 2.60% and 0.133% respectively.Theoretical calculation closed loop input resistance is 43.50 kΩ,output resistors 72.72 Ω,The voltage amplifier circuit has a good performance.