Which of the push-pull amplifiers is presently the most popular form of the class B power amplifier?(a) Quasi-complementary(b) Transformer-coupled(c) Complementary-symmetry(d) SymmetryThe question was posed to me during an interview for a job.This is a very interesting question from Classification of Output Stages in section Differential and Multistage Amplifiers of Electronic Devices & Circuits

Which of the push-pull amplifiers is presently the most popular form o

1.	Which of the push-pull amplifiers is presently the most popular form of the class B power amplifier?(a) Quasi-complementary(b) Transformer-coupled(c) Complementary-symmetry(d) SymmetryThe question was posed to me during an interview for a job.This is a very interesting question from Classification of Output Stages in section Differential and Multistage Amplifiers of Electronic Devices & Circuits
Answer» The correct choice is (a) Quasi-complementary For explanation: In class B operation, a push-pull CONNECTION is obtained using either a TRANSFORMER coupling or by using complementary (or quasi-complementary) operation with npn and pnp transistors to provide operation on opposite polarity cycles. While transformer operation can provide opposite cycle signals, the transformer itself is QUITE large in MANY application.

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