TYU 9.15 The resistance R in the bridge circuit in Figure 9.47 is 50 kΩ. The circuit is biased at V+ = 3 V. (a) Find vO1 as a function of δ. (b) Design an amplifier system such that the output varies between +3 V and −3 V as the parameter δ varies between +0.025 and -0.025 . (Ans. (a) vO1 ≅ 0.75 δ. (b) For an instrumentation amplifier, let R4 /R3 = 10 and R2 /R1 = 7.5 ) Figure 9.47