a) Design an AB-class sound amplifier according to the following criteria and draw the circuit diagram and give the values of all circuit elements.

-Supply voltages will be taken ± 10 V.

-Two 4 Ohm speakers will be connected to the output in series.

-The biasing (ie bias) circuit will be designed with the “VBE multiplier” circuit (Is = 10^-13 A).

-Total output power will be 5 Watt.

-It is desirable that the calm current is 2 mA.

B(Beta) = 100 for output transistors to be used.

b) Calculate the efficiency of the designed circuit.

c) In the designed circuit; Draw the collector current, VEC voltage and power consumption in the pnp transistor (give the values of the important points).

Answer rating: 100% (QA)

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