Video camera system using liquid-crystal polarizing filter to reduce reflected light. - Hideo Fujikake; Kuniharo Takizawa; Tahito Aida; T. Negishi; M. Kobayashi (IEEE Trans. Broadcast., 1998)

Operation of class DE amplifier outside optimum condition. - Hiroo Sekiya; T. Negishi; Tadashi Suetsugu; Takashi Yahagi (ISCAS, 2006)