dB 10 x 10 3 158 mW V 0158 x 50 \u2126 890 mV Chapter 2 problems 8 9 11 27 and 33 8

# Db 10 x 10 3 158 mw v 0158 x 50 ω 890 mv chapter 2

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dB 10 ) x 10 3 = 15.8 mW V = .0158 x 50 = 890 mV Chapter 2, problems 8, 9, 11, 27, and 33 8. State the characteristics of Class A, AB, B and C amplifiers in terms of conduction angle, efficiency, and distortion level.
Class A amplifier conduction angle = 360 degrees Efficiency = 50%, Distortion Level = 0% Class B amplifier conduction angle = 180 degrees Efficiency = 78.5% Distortion Level = -0.7V to +0.7V Class AB amplifier conduction angle = 180 to 360 degrees Efficiency = 50 to 60% Distortion Level = 5 to 10 % Class C amplifier conduction angle = 90 to 180 degrees Efficiency = 100% Distortion Level = high 9. Why are Class C amplifiers unsuitable for use as audio amplifiers? 11. How does a frequency multiplier differ from an ordinary RF amplifiers? 27. The narrowband RF amplifier in Figure 2.44 has an input signal with a frequency of 12MHz. Calculate: a. The value at which C 1 should be adjusted for best performance at the signal frequency.