2005•Unpublished venueRequires access

Power Dependence of Feedback Amplifiers on OpAmp Architecture

Vipul Katyal, Yu Lin, R.L. Geiger

Abstract

Power optimized design strategies for operational amplifiers (opamps) used in finite gain feedback applications with fixed closed-loop settling constraints are introduced. A comparison of several operational amplifier architectures shows that the optimal amplifier architecture is dependent upon the desired closed-loop gain. Closed form expressions are given which relate power dissipation and closed loop bandwidth for a given closed loop gain.

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Key concepts: Operational amplifier, Amplifier, Loop gain, Control theory (sociology), Bandwidth (computing), Open-loop gain, Closed loop, Gain–bandwidth product