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Engineering · Electrical Engineering
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3) Thermal Sensor with Diode Assume OpAmp is ideal 100k 100k All diodes are identical T-300K nVi-30 mV R3 T-400K nV-40 mV dV/dT=-1.8 mV/K a) Find a symbolic expression for the current I, (Hint: ideal OpAmp implies that the 2 b) Derive a symbolic expression for the output voltage Vo with Vi as one of the c) If R,-1 kΩ and we measured V,-670 mV at T-300K, find values for Vo at the d) Derive a value for R, such that the output voltage Vo remains approximately OpAmp input voltages are equal). variables temperatures i) T-300K, and ii) T-400K. constant between T-300K and T-400K.

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