Power Amplifiers – Exercise – 1

46. A class A amplifier with RC = 3.3 kΩ and RE = 1.2 kΩ has a VCC = 20 V. Find IC(sat).

(a) 4.4 mA
(b) 6.1 mA
(c) 16.7 mA
(d) 20 mA

Answer
Answer : (a)
Explanation
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47. Nota

48. Determine VB1.

(a) 0 V
(b) 0.7 V
(c) 9.3 V
(d) 10.7 V

Answer
Answer : (d)
Explanation
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49. Which of the following transistors has been quite popular as the driver device for class D amplification?

(a) BJT
(b) FET
(c) UJT
(d) MOSFET

Answer
Answer : (d)
Explanation
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50. The reflected impedance seen from one side of the transformer to the other side is ________.

(a) N1/N2
(b) (N1/N2)2
(c) (N1/N2)1/3
(d) N1× N2

Answer
Answer : (b)
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