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  author = {W. Li and Y. Niimi and Y. Orino and S. Hirata and M. K. Kurosawa},
  title = {A frequency synchronization method for a self-oscillating PWM signal generator},
  journal = {IEEE Transactions on Circuits and Systems II: Express Briefs},
  year = 2014,
}

@inproceedings{CTT100587064,
  author = {新見嘉崇 and 折野裕一郎 and 黒澤実 and 片桐崇},
  title = {ΔΣ変調を用いたキャリア変調方式PWM 変換の検討},
  booktitle = {電子情報通信学会総合大会講演論文集},
  year = 2008,
}