The circuit in Figure P 6.7-5 is called a difference amplifier and is used for
Chapter 6, Problem P6.7-5(choose chapter or problem)
The circuit in Figure P 6.7-5 is called a difference amplifier and is used for instrumentation circuits. The output of a measuring element is represented by the common mode signal \(v_{\mathrm{cm}}\) and the differential signal \(\left(v_{\mathrm{n}}+v_{\mathrm{p}}\right)\). Using an ideal operational amplifier, show that
\(v_0=-\frac{R_4}{R_1}\left(y_{\mathrm{n}}+v_{\mathrm{p}}\right)\)
when
\(\frac{R_4}{R_1}=\frac{R_3}{R_2}\)
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