56. Which of the push-pull amplifiers is presently the most popular form of the class B power amplifier?
(a) Quasi-complementary
(b) Transformer-coupled
(c) Complementary-symmetry
(d) None of the above
57. Which of the following is (are) the disadvantage(s) of a class B complementary-symmetry circuit?
(a) It needs two separate voltage sources.
(b) There is crossover distortion in the output signal.
(c) It does not provide exact switching of one transistor off and the other on at the zero-voltage condition.
(d) All of the above
58. Which of the power amplifiers is not intended primarily for large-signal or power amplification?
(a) Class A
(b) Class B or AB
(c) Class C
(d) Class D
59. What is the maximum temperature rating for silicon power transistors?
(a) 50º to 80º
(b) 100º to 110º
(c) 150º to 200º
(d) 250º to 300º
60. Which of the following instruments allows more precise measurement of the harmonic components of a distorted signal?
(a) Digital multimeter
(b) Spectrum analyzer
(c) Oscilloscope
(d) Wave analyzer
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