Output Power Enhancement of Single-Ended Class-D Amplifier Without DC Blocking Capacitor and Negative Voltage Source Required

A single-ended class-D amplifier without DC blocking capacitor is presented herein, so as not only to reduce the required size but also to upgrade the low-frequency response. Above all, the corresponding output power of the proposed structure is four times of that of the traditional structure. In this paper, the basic operation principles are firstly described, and secondly some experimental results are provided to demonstrate the proposed topology.