Jason9

What's a class-G amp?

I'll publish the test circuit I used.

A class G amp is a simpler, yet sometimes it could be much more complex and less Hi-Fi version of a class H amp. The main amp is still in class A but it has several supply rails at different voltages and a switching system of some kind to switch between the rails. There are actually a few variations of such amps. The first option is a smooth switching, actually tracing the curves of the peak of the wave. This is somewhat the better option, because it leaves less room for switching distortion. The second option is an abrupt switch. The supply suddenly shifts to the higher rail but that sometimes leads to a considerably big distortion of the output. To prevent this the negative feedback must be veeery deep, in fact the gain must be close to 1 for the output to not distort. I personally don't like class G amps because if you want to have a Hi-Fi quality often the circuit must be much more complex than a class H amp. As i said they are rarely recognized as separate classes because they're just a variation of some of the normal classes (A,B,AB). They just improve some of the characteristics of the normal classes (most commonly efficiency)

Ok. (Sorry I took so long to reply, I just kinda forgot to do that.)

Could you please make a class-G amp?

There are many ways to make it. I believe I've tried before with hard switching, but i couldn't prevent the output from distorting during the transition between the rails. Anyway class G amps are not very good. I'd recommend class H if you want to increase a class A's efficiency