Question: Design an audio amplifier system that will take input signal of 100 mV from a microphone of 75 ?, amplify the signal with a gain of 40, and finally drive a speaker of 8 ?.
You have to perform your simulation in a SPICE simulator (LTSPICE, PSPICE, etc.) and you are allowed to use either BJT or MOSFET to design your system. You must use appropriate matching network to match the resistance for maximum power transfer or reliable operation of the system.
Describing your system, selection of transistors, design equations and calculations, simulation results (Gain plot, input signal, output signal) from the SPICE simulator, and finally discussion and conclusion.