Prelab A Analyze The Circuit In Figure 4 6 A Find V As A Function Of R And I Assume The Op Amp Is Ideal B If 1 (48.09 KiB) Viewed 41 times
Prelab A Analyze The Circuit In Figure 4 6 A Find V As A Function Of R And I Assume The Op Amp Is Ideal B If 2 (15.01 KiB) Viewed 41 times
Prelab - A. Analyze the circuit in Figure 4.6. (a) Find V, as a function of R and I (assume the op-amp is ideal). (b) If I = 250µA and the desired V = -0.75V, find the proper value for R. (c) Verify your result by running a SPICE simulation using the 741 op-amp model. Be sure to display voltages on your schematic. (SPICE hint: Most students have found the "Universal Op Amp" works best as your op-amp. Pay special attention to your pins as well as the directions of applied voltages. Use separate DC voltage sources which have been grounded for pin 7 and pin 4.) la († R +5V -5V -0% Figure 4.6-Current to voltage converter using an op-amp. B. For the circuit in Figure 4.7, calculate V. Calculate the threshold input voltage, V₁, that will change the output of the comparator from high to low. Show all calculations and explain your work. C. Model the circuit in Figure 4.7 in SPICE for Vi=2V and V₁ = 4V. Print out a copy of both schematics with voltages displayed to hand in. Your SPICE simulation and calculations should match.
Revised February 20, 2018 V₁ +5V • 2.2ΚΩ 1ΚΩ ·5.1kΩ + +5V 319 -SV +5V Figure 4,7 – Voltage comparator. •10kΩ
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