Using the input impedance of the op-amp circuit you built in the lab, and referring to...
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Using the input impedance of the op-amp circuit you built in the lab, and referring to Figure 8.7... 1. Calculate the maximum possible value of Vref- 2. Explain why you were unable to get 7.5V reference from your pot after adding the differential amplifier. 3. Calculate the equivalent resistance of your two fingers in parallel with R₂. 4. Suppose the FG was producing 7.5V + 100mV x sin(wt), and the reference from the pot is exactly 7.5V. Assuming you had touched the feedback R₂, calculate Vout as a function of time. Hint: Because your resistors are now asymmetric, you can't use the gain formula anymore! 10k 10k Vref R1+R2 Figure 8.7: Pot Reference With Op-Amp Input Impedance Using the input impedance of the op-amp circuit you built in the lab, and referring to Figure 8.7... 1. Calculate the maximum possible value of Vref- 2. Explain why you were unable to get 7.5V reference from your pot after adding the differential amplifier. 3. Calculate the equivalent resistance of your two fingers in parallel with R₂. 4. Suppose the FG was producing 7.5V + 100mV x sin(wt), and the reference from the pot is exactly 7.5V. Assuming you had touched the feedback R₂, calculate Vout as a function of time. Hint: Because your resistors are now asymmetric, you can't use the gain formula anymore! 10k 10k Vref R1+R2 Figure 8.7: Pot Reference With Op-Amp Input Impedance
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Related Book For
Fundamental accounting principle
ISBN: 978-0078025587
21st edition
Authors: John J. Wild, Ken W. Shaw, Barbara Chiappetta
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