2003•Unpublished venueRequires access

A novel method for determining open-loop parameters in feedback amplifiers

Gianluca Giustolisi, G. Palumbo

Abstract

A novel method for determining open-loop parameters, such as unity-gain frequency and phase margin, in feedback amplifiers is given. It is based on relations between open-loop and closed-loop configurations and is very useful for evaluating the above parameters in a unity-gain amplifier from a simple measure of its closed-loop 3-dB cut-off frequency and the respective phase for a given feedback factor, /spl beta/.

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Available abstract

Key concepts: Phase margin, Amplifier, Control theory (sociology), Open-loop gain, Loop gain, Feedback loop, Open-loop controller, Negative feedback amplifier