2009•Unpublished venueRequires access

Simulation Analysis and Theoretical Calculations in Negative Feedback Amplifier Circuit

Yi Yang

Abstract

By adopting MATLAB software, the paper applies the block diagram for theoretical calculations of the series negative current feedback amplifier circuit which is designed by operational amplifier。 The results indicate: 1) closed- loop gain and open- loop gain to meet basic relationship; 2) the stability of feedback is enhanced and output resistance increased。 Furthermore, the result of open- loop and closed- loop gain of theoretical calculation is consistent with simulation which is applied by EWB software, which confirmed elementary conclusions and relationships in negative- feedback amplifier quantitatively.

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Key concepts: Open-loop gain, Negative feedback amplifier, Negative feedback, Amplifier, Feedback loop, Current-feedback operational amplifier, Operational amplifier, Control theory (sociology)