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2. What is maximum positive and negative voltages for the class B driven by a C.E. circuit? 2. Draw class AB adopted by UA741. What is the maximum positive and negative rails of this circuit? 3. The limitations of the output power amplifier includes the current drivability and the voltage swing. Draw two approaches for the power amplifier where the the output current (drivability) is higher than UA741 or the CE driver of class B amplifier. 3. Dra the maximum positive and negative rail voltages for the all NPN power amplifier. 4. Draw a circuit for Class AB power amplifier with high current enhancement using comnosite devices
engineering   Electrical-Engineering   
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Ans 2) The operation in a Class B amplifier has Zero DC bias. It is beacuse the transistors are biased at the cutoff. Therefore the transistor conducts only when the maximum input voltages or the maximum +ve and - ve voltages are greater than the Base-Emitter voltage.

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