Exercise: Power Amplifiers

Questions for: Power Amplifiers

Calculate the efficiency of a class B amplifier for a supply voltage of VCC = 20 V with peak output voltage of VL(p) = 18 V. Assume RL = 16.
A:
78.54%
B:
75%
C:
70.69%
D:
50%
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Which of the power amplifiers has the lowest overall efficiency?
A:
Class A
B:
Class B or AB
C:
Class C
D:
Class D
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
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
Answer: D
No answer description is available. Let's discuss.
📖
📝
💬
👁️
A class A amplifier with RC = 3.3 k and RE = 1.2 k has a VCC = 20 V. Find IC(sat).
A:
4.4 mA
B:
6.1 mA
C:
16.7 mA
D:
20 mA
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
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: D
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz