Chapter 8

Voltage-Feedback Op Amp Compensation

Abstract

Compensation of real-world op amps provides some relief from instability concerns. The designer is the first line of defense, keeping their circuits within a safe operating region. Operational amplifiers are almost always internally compensated to help the designer. This is done with a single, dominant pole—but it comes at a heavy price: much of the op amp gain at higher frequencies is sacrificed to make the circuit stable. There are additional external compensation techniques that the designer can employ to make the circuit more stable.

Keywords

Compensation; Dominant pole; Gain compensation; Lead compensation; Lead-lag compensation

8.1. Introduction

Voltage-feedback amplifiers (VFAs) have been ...

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