"W. Li,Y. Niimi,Y. Orino,S. Hirata,M. K. Kurosawa","A frequency synchronization method for a self-oscillating PWM signal generator",,"IEEE Transactions on Circuits and Systems II: Express Briefs",,"Vol. 61","No. 4","pp. 244-248",2014,Feb.
"Yoshitaka Niimi,yuichiro orino,Minoru Kuribayashi Kurosawa,Takashi Katagiri","ΔΣ変調を用いたキャリア変調方式PWM 変換の検討",,"電子情報通信学会総合大会講演論文集",,,,"p. 15",2008,Mar.