Key Topic 52: Amplifiers-2

Question 1

3-52G1: The Class B amplifier output is present for what portion of the input cycle?

A. 360 degrees.
B. Greater than 180 degrees and less than 360 degrees.
C. Less than 180 degrees.
D. 180 degrees.

Answer 1

D. 180 degrees.

Question 2

3-52G2: What input-amplitude parameter is most valuable in evaluating the signal-handling capability of a Class A amplifier?

A. Average voltage.
B. RMS voltage.
C. Peak voltage.
D. Resting voltage.

Answer 2

C. Peak voltage.

Question 3

3-52G3: The Class C amplifier output is present for what portion of the input cycle?

A. Less than 180 degrees.
B. Exactly 180 degrees.
C. 360 degrees.
D. More than 180 but less than 360 degrees.

Answer 3

A. Less than 180 degrees.

Question 4

3-52G4: What is the approximate DC input power to a Class AB RF power amplifier stage in an unmodulated carrier transmitter when the PEP output power is 500 watts?

A. 250 watts.
B. 600 watts.
C. 800 watts.
D. 1000 watts.

Answer 4

D. 1000 watts.

Question 5

3-52G5: The Class AB amplifier output is present for what portion of the input cycle?

A. Exactly 180 degrees.
B. 360 degrees.
C. More than 180 degrees but less than 360 degrees.
D. Less than 180 degrees.

Answer 5

C. More than 180 degrees but less than 360 degrees.

Question 6

3-52G6: What class of amplifier is characterized by conduction for 180 degrees of the input wave?

A. Class A.
B. Class B.
C. Class C.
D. Class D.

Answer 6

B. Class B.