An electronic ballast for electrodeless lamp with a long transmission cable. - Takahide Sato; Ong Zi Hao; Yuta Naito (ISPACS, 2015)

A distinct operation frequency cascaded N-path filter with improved harmonic rejection ability. - Takahide Sato; Ong Zi Hao; Syunsuke Kasai (ISPACS, 2016)

An improved differential N-path filter with sampling computation for increased stopband rejection ability. - Ong Zi Hao; Takahide Sato (ISCIT, 2017)

Circuit Scale Reduced N-Path Filters with Sampling Computation for Increased Harmonic Passband Rejection. - Ong Zi Hao; Takahide Sato; Satomi Ogawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)