Question1 You have a sensor R₂ and a Wheatstone bridge connected to an instrumentation amplifier (shown below): www.ww R5 R₁ a. Assume the op-amps are ideal. Write an expression for Vdiff in terms of the resistances and Vin. Hint: What is the differential gain of the differential amplifier? b. Why are the buffers needed? R₁ R₁ c. How can you modify the above Wheatstone bridge to maximize sensitivity and provide temperature compensation? Vb Buffers Differential amp d. You add the filter shown on the right of the above circuit. Derive the filter's transfer function. Assume the Op- amp is ideal. HIC R₁ Vin R₂ ww Vdiff Vout Vin = 0 e. What are the cutoff frequencies and the DC gain of this filter? Vin R₁ R3 R₂ R Vdiff

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Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.