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Which of the following amplifier is less efficient than others?(a) Class C(b) Class B(c) Class A(d) Class ABThe question was asked in examination.The question is from Comparison of Amplifier Classes topic in portion Power Amplifier of Analog Circuits

Answer»

Right choice is (c) Class A

Explanation: Class A amplifiers are the least efficient of all. A maximum of 25% theoretical EFFICIENCY is obtainable, 50% for when using TRANSFORMER or with induced coupling. This wastes power, as well as INCREASES the cost and requires HIGHER rated output devices.


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