Dead-zone-less PLL frequency synthesizer by hybrid phase detectors. - Yasuaki Sumi; Shigeki Obote; Naoki Kitai; Ryousuke Furuhashi; Hidekazu Ishii; Yoshitaka Matsuda; Yutaka Fukui (ISCAS (4), 1999)

PLL frequency synthesizer with an auxiliary programmable divider. - Yasuaki Sumi; Shigeki Obote; Naoki Kitai; Ryousuke Furuhashi; Yoshitaka Matsuda; Yutaka Fukui (ISCAS (2), 1999)

PLL synthesizer with multi-programmable divider and multi-phase detector. - Yasuaki Sumi; Shigeki Obote; Naoki Kitai; Hidekazu Ishii; Ryousuke Furuhashi (IEEE Trans. Consumer Electron., 1999)