I will be designing a 30 watt audio amplifier. I read numerous stuff on the internet mostly about types/classes. Here are my observations
The requirement is that it should be transistor based: jfet,bjt,mosfets only (not allowed to use IC based design like the LMxxxx)
There will be 3 sections of the circuit, the powersupply pre amp and the power amp.
The signal that needs to.be pre amp is an mp3 player from mobile phones, those with 3.5 jack. The load will be a loud speaker around 8 ohms.
What is the real meaning of 30 watt amplifier, how do we make it 30 watt, what are the parameters? (as far as i know, 30 watt here means the maximum power.)
Now, for the preamp, i prefer to use class AB since its the best compromise between class a and class b. How can we reduce the noise in the pre amp so that it is very clean since the output signal will be fed to the power amp??
Also, for the power amp, we know it will be amplified here and current will be the main factor since we need heavy currents to drive the speaker. now isn't it just combining preamp and poweramp reduces the overall noise in the system? what are the factors do we need in desinging both pre amps and power amps?
Theres also one thing in my mind, how can we add bass and treble in the circuit? Will it make the circuit complicated?