A Class D amp is just an oscillator, comparator, and an output stage. All of which can be fulfilled (although poorly) by a single 555. I designed a Class D amp in SPICE, using only a LM339 and ...

An Arduino Due forms the heart of the project, ... The sound signal is passed through an LM4811 headphone amplifier for private listening, and a PAM8403 Class D audio amplifier for the built-in ...

Class D amplifiers maynot have much name recognition, but they're already changing the ways welisten to music, with the welcome side effect of shrinking and greeningthe world's audio hardware. A ...