QUESTION 7 Consider 4 different circuits. For each circuit, an input voltage shown below results in the output voltage shown next to it. Which of the following statements is NOT CORRECT? 1) Vin (t) = t, Vout(t) = t² 2) Vin (t) = sin(3t), Vout(t): = 5cos (3t+ 3)Vin(t) = f(t), Vout(t) = f(t) + 5 -3t 4) Vin (t) = e-³t, Vout (t) = 20e- a. Circuits 1) and 2) could be linear b. Circuits 2) and 4) could be linear c. Circuits 1), 2) and 4) could be linear d. Circuit 1) and 3) could be linear

Problem 8: The figure (below left) describes a common problem in which a small input signal vin is contaminated by vnoise from an AM radio station. To minimize noise, an inductor is added between the input and the measurement v, (below right). Assume vin-1.0 and noise 1.0cos(w t). Vin(t) Vnoise(t) R 10 ΚΩ A + vo(t) Vin Vnoise ja L R 10 ΚΩ For the circuit on the above right, 1) What is vo when there is no noise (vnoise=0)? 2) What is vo when there is no input signal (v=0)? in 3) What is vo when neither is zero? 4) Explain how large values of L will reduce the noise in vo 5) Show that L=22.6mH will reduce the f=700kHz noise to 10% of its original value. 6) Use LTspice to show that your circuit works A + Vo

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Problem 2: Find the following 1.The voltage of the inductor when f-150 ke 2 The voltage of the inductor when f-150 MHz R=5 k L20 mH V-120V f