A 170 o C maximum temperature digester is used in a paper mill to process wood chips
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A 170oC maximum temperature digester is used in a paper mill to process wood chips that will eventually become paper. As shown in figure a, three electronic thermometers are placed along its length. Each thermometer outputs 0 V at 0oC, and the voltage changes 25mB/oC. We will use the average of the three thermometer voltages to find an aggregate digester temperature. Furthermore, I volt should appear at Vo for every 10oC of average temperature. Design such an averaging circuit using the op-amp configuration shown in figure if the final output voltage must be positive.
Transcribed Image Text:
Paper mill digester Thermo- meter #3 Thermo- meter #2 Thermo- meter #1 (a) R1 RB Rf R2 RA ww R3 V2 Vo Vx V3 (b)
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V3 R R R3 Rf Vx RA RB Vo Vx op amp opamp 2 is an inverting opamp Vo Vo 1 If Re R i...View the full answer
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