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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 450

Chopper vs bipolar op amps—an unbiased comparison

George Erdi

Abstract

A comparison of the performance of chopper versus bipolar operational amplifiers is presented.

Keywords

Operational amplifier

chopper amp

bipolar amp

Over the last few years dozens of new CMOS chopper stabilized and precision bipolar op amps have been introduced. Despite the fact that these two groups compete for the same market, a valid scientific comparison of the merits of choppers and precision bipolar is unavailable. The probable explanation is that most analog IC companies have introduced products in one group or the other but not both. Therefore, articles and news releases have extolled the benefits of one, while knocking the other. Linear Technology ...

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