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A common application for instrumentation amplifiers is to measure voltages in resistive strain gauge circuits. These strain sensors work by exploiting the changes in resistance that result from geometric distortions, as in Eq. [6] of Chap. 2. They are often part of a bridge circuit, as shown in Fig. 6.61a, where the strain gauge is identified as RG. (a) Show that
AD622 Specifications
Amplifier gain G can be varied from 2 to 1000 by connecting a resistor Between pins 1 and 8 with a value calculated by
FIGURE 6.61
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Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning