A design of multi-GHz continuous-time bandpass filters using 0.1-μm HEMT technology. - Shunsuke Nakamura; Uichiro Omae; Hiroshi Watanabe; Takao Waho (ECCTD, 2007)

Enhancement of comparator operation speed by using negative-differential-resistance devices. - Tomohiko Ebata; Uichiro Omae; Kazuya Machida; Keita Hoshi; Takao Waho (ISCAS, 2010)