1. Kwang-Il Oh, Jeong-Yun Lee, Gwangsub Kim and Donghyun Baek, "Charge-Pump based Fast Locking duty Cycle Corrector for Frequency Doubler".
2. Gwangsub Kim, Jeong-yun Lee, Kwang-il Oh, Jun-young Park and Donghyun Baek, "Capacitor-less Low Dropout Regulator with Current Efficiency 99.99%".