2.74 In the instrumentation amplifier of Fig. 2.20(a), one of the resistors R2 is replaced by a slightly different value R2 + ∆R. Find an expression for the resulting gain from a common-mode input at vI1 and vI2 to the output vO. Make this gain zero by modifying the value of one of the resistors R1.
2.74 In the instrumentation amplifier of Fig. 2.20(a), one of the resistors R2 is replaced by a slightly different value R2 + ∆R. Find an expression for the resulting gain from a common-mode input at vI1 and vI2 to the output vO. Make this gain zero by modifying the value of one of the resistors R1.
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