4 General Properties of Electronic, Single-Loop Feedback Systems

4.1 INTRODUCTION

In electronic circuits and systems, feedback will be defined as a process whereby a signal proportional to the system’s output is combined with a signal proportional to the input to form an error signal which affects the output. Nearly, all analog electronic circuits use feedback; either implicitly as the result of circuit design (e.g., from an unbypassed BJT emitter resistor) or explicitly by a specific circuit network between the output and the input nodes. A circuit can have one or more specific feedback loops. However, in the interest of simplicity, we will consider ...

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