Question 12.1: Determine the value of the external gain-setting resistor RG...
Determine the value of the external gain-setting resistor R_{\mathrm{G}} for a certain IC instrumentation amplifier with R_1=R_2=25 \mathrm{k} \Omega. The voltage gain is to be 500.
R_{\mathrm{G}}=\frac{2 R}{A_{c l}-1}=\frac{50 \mathrm{k} \Omega}{500-1} \cong 100 \Omega
P R A C T I C E EXERCISE*
What value of external gain-setting resistor is required for an instrumentation amplifier with R_1=R_2=39 \mathrm{k} \Omega to produce a gain of 325?
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