1. Kwang-il Oh, Jeong-yun Lee, Gwangsub Kim, Jun-young park and Donghyun Baek, "Fast Locking Duty Cycle Corrector Loop using Binary Search Algorithm for Frequency Doubler".
2. Jeong-yun Lee, Kwangsup Kim, Kwang-il Oh, and Donghyun Baek, "24GHz Class-C VCO with Digital Controlled Auto-adaptive Bias Technique".