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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 411

Gain trimming in instrumentation amplifier-based systems

Jim Williams

Abstract

Gain trimming in instrumentation amplifier-based systems is discussed.

Keywords

Gain trimming

instrumentation amplifier

Gain trimming is almost always required in instrumentation amplifier-based systems. Gain uncertainties, most notable in transducers, necessitate such a trim.

Figure 411.1, a conceptual system, shows several points as candidates for the trim. In practice, only one of these must actually be used. The appropriate trim location varies with the individual application.

image
Figure 411.1 Conceptual Transducer Signal Conditioning Path Showing ...

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