2.5GHz PLL with current matching charge-pump for 10Gbps transmitter design. - Jaehong Ko; Wookwan Lee; Soo-Won Kim (ACM Great Lakes Symposium on VLSI, 2005)

The low-power and low-area PWM by light intensity for photoflash in 0.35-µm CMOS. - Wookwan Lee; Won Ho Choi; Young-Jae Min; Hoon Ki Kim; Soo-Won Kim (ISCAS, 2008)