17.7 A digital DLL with hybrid DCC using 2-step duty error extraction and 180° phase aligner for 2.67Gb/S/pin 16Gb 4-H stack DDR4 SDRAM with TSVs. - Won-Joo Yun; Indal Song; Hanki Jeoung; Hundai Choi; Seok-Ho Lee; Jun-Bae Kim; Chi-Wook Kim; Jung-Hwan Choi; Seong-Jin Jang; Joo-Sun Choi (ISSCC, 2015)

An Enhanced Built-off-Test Transceiver with Wide-range, Self-calibration Engine for 3.2 Gb/s/pin DDR4 SDRAM. - Joung-Wook Moon; Hye-Sung Yoo; Hundai Choi; Il-Won Park; Seok-Yong Kang; Jun-Bae Kim; Haeyoung Chung; Kiho Kim; Dong-Hun Lee; Ki-Jae Song; Seok-Hun Hyun; Indal Song; et al. (A-SSCC, 2018)