Multiple sweeping using quaternion operations. - Koichi Harada; Takeshi Anzai (Comput. Aided Des., 2002)

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)