Homework 26 ECE201 Linear Circuit Analysis Due in class Wednesday November 2 2011 1 For the ideal operation amplifier shown below determine the following a What are the numerical values for i2 and i b In terms of the sources and resistances what are the voltages at the inverting V and noninverting V terminals of the ideal opamp c If V2 0V V1 30 R1 2 and Rf 1 find Vout d If V2 10V V1 30 R1 2 and Rf 1 find Vout e If V2 10V V1 30 R1 2 and Rf 1 2 find Vout f If V2 10V V1 30 R1 2 and Rf 10 find ioa g If V2 30V V1 10 R1 2 and Rf 10 find ioa h Gain is defined as Vout Vin What does Rf need to be such that the gain of the opamp has a magnitude of 1000 Assume that Vin V1 R1 2 and V2 0V i If V1 V2 10V then what is Vout and ioa j If a load of RL 10 is placed across the output terminals then what is the power absorbed by RL Assume that V2 10V V1 5 R1 10 R2 15 and Rf 20 k Consider the configuration given in problem 1j again determine ioa l The maximum output voltage saturation voltage for an opamp typically cannot exceed the voltage that powers the opamp The voltage that powers the opamp is usually not shown in schematics If the saturation voltages are 15V and 15V for this opamp i e 15V Vout 15V then what is the maximum voltage that Vin V1 can be such that its gain has a magnitude of 1000 Assume that V2 0V and R1 2 2 For the ideal opamp shown below determine the following a Symbolically express Voa in terms of the resistances Rf R1 R2 and sources V1 V2 b If Voa 16V1 12V2 and Rf 64 find suitable values for the resistances R1 and R2 For the following problems assume that the resistances are R1 2 R2 4 Rf 2 R3 2 R4 4 and RL 4 and the voltage sources are V1 2V V2 4V and V6 8V c d e f g Determine i5 Determine ioa Determine i6 Determine VL What voltage does V6 need to be tuned to such that i6 0A
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