Say Farewell to Offset Voltage with a Zero-Drift Op Amp (.PDF Download)

As analog engineers, it’s tempting to fantasize about one day coming close to designing the ideal operational amplifier we encountered in college: infinite bandwidth, zero output resistance, and so on. Although it’s a good first-order approximation to simplify analysis, the ideal op amp will remain forever just out of reach, together with ending world hunger, eliminating the National Debt, and the Cubs winning another World Series. Okay, scratch that last one...

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