An open-loop class-D audio amplifier with increased low-distortion output power and PVT-insensitive EMI reduction. - Shih-Hsiung Chien; Li-Te Wu; Ssu-Ying Chen; Ren-Dau Jan; Min-Yung Shih; Ching-Tzung Lin; Tai-Haur Kuo (CICC, 2014)