The circuit shows a two-op-amp instrumentation amplifier. R4 R2 R3 ww ww R1 Derive an expression for vo in terms of vjand v2. Assume that R1= 8 kN, R2 = 44 kN, R3 = 30 k2, gain = 4, and R4= (gain-1)*R3 kN. Vo= ]) vq+ ([

4. PD FB IN- 1 2 3 IN+ 4 8 VS+ 7 6 5 OUT NC VS- Using the Op-Amp diagram shown above, draw a line to create: 4.a. non-inverting amplifier 4.b. Inverting amplifier

The op amp in the circuit in is ideal. Part A What op amp circuit configuration is this? ANSWER: v₂ = A difference amplifier circuit. An inverting summing amplifier. A non-inverting summing amplifier, R Part B Find an expression for the output voltage v, in terms of the input voltage v. Assume that is in volts. Suppose Ry = 20 kn. Express your answer in terms of V. ANSWER: V Part C Suppose v₁ = 2 V. What value of Ry will cause the op amp to saturate? Express your answer to three significant figures and include the appropriate units. ANSWER: 21 5 kn w 8 k 9-67-5 2 V m 10 V -10 V 27 k

1. Consider the ideal op-amp circuit below. Let Us = 0.1 V, R1 = R2 = R3 = R3 = 100 kN, and R4 = 98 kN, Solve for Vo. R1 RA R5 vo R2 Us R3

= Make a inverting op amp to have a voltage gain of -5 with an R, 2 kn. You must ensure that the output does not exceed +12 V. a. Specify the value of Rf and the supply voltages +Vcc. Vs b. For this circuit, what is the range of the source voltage, vº, to ensure that the op amp remains linear? + Rs Rf +Vcc -Vcc + Vo

a) Using a NTC thermistor with "B=4000K, resistance: 5k2 at 25°C" we want to measure the temperature of an environment in the range 50°C - 100°C. Design a suitable circuit for this purpose with "zero" output signal |v) value at 25ºC. Express the output and its temperature-sensitivity in terms of temperature (y=f(T°C) and dy/dT= f(TºC)). Roughly draw y and dy/dT for the given temperature range. (Note: For NTC: RNTC=Roexp(B(1/T-1/To))

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