2011•Unpublished venueRequires access
Simulation and Research of the Operational Amplyfier-Differential Amplifying Circuit with Negative Feedback of Voltage Shunt
Yang Yi-jun
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Abstract
The theoretical calculation and simulation analysis of the operational amplifier and operational amplifier-differential amplifying circuit with negati ve feedback of voltage shunt which is consisted by transistor with the method of block diagram is introduced in this paper.Transresistance gain is got by calcu lating the basic amplifier voltage gain theoretically according to the multistag e amplifier′s calculate method.The closed-loop gain is got by small-signal e quivalent circuit,the result show that the basic relationship of negative feedb ack amplifying circuit is satisfied in the two methods.The results of open-loo p and closed-loop′s gain from simulation are meet with the theoretical calcula tion which shows the calculation and analysis′s right.