This paper presents a voltage-mode three-level class-D gallium nitride (GaN) power amplifier (PA) for the 700MHz band. The PA achieves a drain efficiency of 68.7%, at a maximum output power of 2.1 W ...

Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier ...