Here is the situation, I am taking an electronics course and have to design a audio amplifier. There are a few restrictions on it though, we have to use BJTs(Q2N2222) and we will be supplied +13.8V rails. The amp must output 12W across 8 ohm speakers. We have decided to use a differential amplifier on the input, going into a common emitter, going into a push pull amplifier. We started by modeling them in Pspice, the differential amp is working fine, but now we are stuck on the common emitter. We need a gain of a little under 30, with an input signal of 1V(peak to peak).
Here is a model of it in pspice with some values plugged in, and I need some help with it. I can't seem to get the gain anywhere near 30, at most 2.5, and it doesn't seem to be following the equations we went over in class. I would like to change as little as possible about this circuit, or at least keep the supply voltages the same, as well as the BJT and input.
It either gives me a small gain, or something that would sound horrible.
Here is a model of it in pspice with some values plugged in, and I need some help with it. I can't seem to get the gain anywhere near 30, at most 2.5, and it doesn't seem to be following the equations we went over in class. I would like to change as little as possible about this circuit, or at least keep the supply voltages the same, as well as the BJT and input.
It either gives me a small gain, or something that would sound horrible.