Claimed as the industry’s first pulse-density modulation (PDM), digital-input Class D audio amplifier for handset and other portable applications, the SSM2517 combines an audio DAC, power ...

A block diagram of the Class-D amplifier is shown in Figure 1. The techniques discussed in this paper describe how a single-frequency, sine wave signal was generated through a Class-D amplifier with ...

Analog Devices, Inc., has introduced what the company claims is the industry's first PDM (pulse density modulation) digital-input Class D audio amplifier for handset and other portable applications, ...

PDM — pulse density modulation — is similar to PWM and, like PWM, requires a filter that could range from a simple RC network to an active filter. You can see the result in the video below.