Theoretical Calculations and Simulation Analysis in Differential-Operational Amplify Current with Parallel Negative Feedback of Circuit
Mao Pei · Journal of Beijing Electronic Science and Technology Institute · 2010
Differential-operational amplify current with parallel negative feedback circuit is designed by employing the directional coupling method.The current gain is achieved by calculating the basic amplifier voltage gain according to the calculating method for multistage amplifier.Moreover,current gain of feedback amplifier is also derived by solving the node equations of small-signal equivalent circuit.The results show that the basic relationships between the negative feedback amplifier circuits in the two methods are satisfied.Furthermore,the results of the basic amplifier current gain and the feedback amplifier gain of theoretical calculation are consistent by simulation with the help of EWB software.