The signal voltage gain of an amplifier, Av, is defined as: Av = IC � RC

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The signal voltage gain of an amplifier, A_v, is defined as:
Options
A.
B. A_v = I_C � R_C
C.
D.

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Transistors and Applications problems

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1. Which of the following conditions are needed to properly bias an npn transistor amplifier?
Options
A. Forward bias the base/emitter junction and reverse bias the base/collector junction.
B. Forward bias the collector/base junction and reverse bias the emitter/base junction.
C. Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
D. Apply a large voltage on the base.

3. The primary function of the bias circuit is to
Options
A. hold the circuit stable at V_CC
B. hold the circuit stable at v_in
C. ensure proper gain is achieved
D. hold the circuit stable at the designed Q-point

4. In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid
Options
A. crossover distortion
B. unusually high efficiency
C. negative feedback
D. a low input impedance

5. The depletion-mode MOSFET
Options
A. can operate with only positive gate voltages
B. can operate with only negative gate voltages
C. cannot operate in the ohmic region
D. can operate with positive as well as negative gate voltages

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