Design a feasible class A silicon BJT Power Amplifier that provides a high voltage gain using 15 volts supply and employs a concept to increase its loaded efficiency to 50% so that little power loss i

Design a feasible class A silicon BJT Power Amplifier that provides a high voltage gain using 15 volts supply and employs a concept to increase its loaded efficiency to 50% so that little power loss is provided at the collector terminal.

Given by manufacturer for safe operation, the amplifying component has a DC current gain of 200 and a collector current limit of 4mA. The output stage of the Amplifier drives a headphone with 32-ohms load impedance applicable for smartphones.