class d amplifier

[noblevision]

hello
can anybody help me with a circuit diagram of a class d amplifier ::)

[audioguru]

Most semiconductor manufacturers have class-D audio amplifier ICs that are very complicated inside.

A class-D amplifier uses switching transistors and Pulse-Width-Modulation. The duty-cycle of the high frequency pulses determines the average output voltage and the position of the cone of a loudspeaker. The output transistors continuously switch fully on and fully off so that they don't produce much heat.
Google has many articles like this one:

ClassD.pdf

[Kevin Weddle]

The P channel needs to be on top, the N channel on the bottom.

[audioguru]

The P channel needs to be on top, the N channel on the bottom.

Confusing, isn't it?
Wouldn't it be nice if everybody drew the symbol for a Mosfet the same way?

[Kevin Weddle]

I didn't know that, thank you.