A class-D amplifier using a spectrum shaping technique [audio power amplifier]. - Akira Yasuda; Takashi Kimura; Koichiro Ochiai; Toshihiko Hamasaki (CICC, 2004)

A single-chip audio system with delta-sigma DAC and class-D amplifier. - Akira Yasuda; Akinori Ohkubo; Katsuya Ogata; Hajime Ueno; Takeshi Anzai; Takashi Kimura; Koichiro Ochiai; Toshihiko Hamasaki (ISCAS, 2006)