Which of these is incorrect for complementary symmetry push-pull amplifiers?(a) During positive cycle NPN transistor conducts(b) It is easier to fabricate on IC(c) Size of the transformer required reduces(d) Efficiency and figure of merit are same as transformer coupled push-pull amplifierThis question was addressed to me in an interview for internship.Enquiry is from Push-Pull Class B Amplifier topic in portion Power Amplifier of Analog Circuits

Which of these is incorrect for complementary symmetry push-pull ampli

1.	Which of these is incorrect for complementary symmetry push-pull amplifiers?(a) During positive cycle NPN transistor conducts(b) It is easier to fabricate on IC(c) Size of the transformer required reduces(d) Efficiency and figure of merit are same as transformer coupled push-pull amplifierThis question was addressed to me in an interview for internship.Enquiry is from Push-Pull Class B Amplifier topic in portion Power Amplifier of Analog Circuits
Answer» The correct CHOICE is (c) Size of the TRANSFORMER required reduces The EXPLANATION is: The complementary symmetry push-pull amplifier uses one NPN and one PNP transistor to conduct in positive and negative cycles respectively. It does not affect efficiency or figure of merit, but since no transformer is being used, it is easier to fabricate on ICs.

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