FINALS FOR NEIL EMIYS

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Question 3. 3. (TCO 2) How must the two junctions of an NPN transistor in common-base configuration be biased so the transistor is in saturation region? (Points : 5)

       The base-emitter junction is forward-biased, and the collector-base junction is reverse biased.        The base-emitter junction is reverse-biased, and the collector-base junction is forward biased.        The base-emitter and collector-base junctions are both forward-biased.        The base-emitter and collector-base junctions are both reverse-biased.

Question 5. 5. (TCO 3) A power amplifier has a gain of 45 dB and an input level of 2 mV. Assuming that the input and output impedances are the same, what is the voltage level at the amplifier output? (Points : 5)

       0.123 V        0.223 V        0.356 V        0.444 V

Question 6. 6. (TCO 4) Which best describes a field-effect transistor? (Points : 5)

       A JFET can be used as a voltage-controlled resistor.        Maximum current for any JFET (IDSS) occurs when VGS = 0 V.        High input impedance is an important characteristic of FET.        All of the above

Question 7. 7. (TCOs 2 and 4) Which statement is true for a common-gate FET configuration? (Points : 5)

       Vin is applied to drain and Vout is taken from the gate.        Vin is applied to source and Vout is taken from the gate.        Vin is applied to gate and Vout is taken from the drain.        Vin is applied to source and Vout is taken from the drain.

Question 8. 8. (TCO 5) What is the output impedance for an ideal op-amp? (Points : 5)

       0        -Rf/Ri        1+Rf/Ri        1000K

Essay Questions:

Question 1. 1. (TCOs 6 and 8) Elaborate on the structure and function of a summing amplifier. Give an application example. (Points : 15)

Question 2. (TCOs 7 and 8) Elaborate on the structure, function, and the characteristics of the frequency response of an active band-stop filter circuit. Give an application example. (Points : 15)

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