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Title : MT-068: Difference and Current Sense Amplifiers
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Date : 25-Mar-2009
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A simple subtractor or difference amplifier can be constructed with four resistors and an op amp, as shown in Figure 1 below. It should be noted that this is not an in-amp (see Tutorial MT-061), but it is often used in applications where a simple differential to single-ended conversion is required, such as current sensing.
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