A digital PLL with two-step closed-locking for multi-mode/multi-band SAW-less transmitter. - Keisuke Ueda; Toshiya Uozumi; Ryo Endo; Takahiro Nakamura; Tetsuya Heima; Hisayasu Sato (CICC, 2012)

A Δ∑-modulator-less digitally-controlled oscillator using fractional capacitors for GSM/EDGE transmitter. - Takahiro Nakamura; Takayasu Norimatsu; Toshiya Uozumi; Keisuke Ueda; Taizo Yamawaki (ESSCIRC, 2012)

Parallel Dual Modulus Prescaler with a Step Size of 0.5. - Hideyuki Nakamizo; Kenichi Tajima; Ryoji Hayashi; Kenji Kawakami; Toshiya Uozumi (IEICE Trans. Electron., 2012)