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Title : MT-062: Basic Two Op Amp In-Amp Configuration
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Date : 25-Mar-2009
Downloads : 31

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In-amps are based on op amps, and there are two basic configurations that are extremely popular. The first is based on two op amps, and the second on three op amps. The circuit shown in Figure 1 is referred to as the two op amp in-amp. Dual precision IC op amps are used in most cases for good matching, such as the OP297 or the OP284. The resistors are usually a thin film laser trimmed array on the same chip.
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