公开(公告)号：US11921158B2

公开(公告)日：2024-03-05

申请号：US18075542

申请日：2022-12-06

申请人： Samsung Electronics Co., Ltd.

发明人： Byung-Sung Kim ,  Yun-Hyok Choi ,  Gyuyeol Kim ,  Sungjung Kim ,  Cheol-Heui Park ,  Sanghoon Lee ,  Jae-Woong Choi

IPC分类号： G01R31/3177 ,  G01R1/073 ,  G01R23/165 ,  G01R25/04 ,  G01R31/317 ,  G01R31/3183 ,  G04F10/00

CPC分类号： G01R31/3177 ,  G01R1/07314 ,  G01R23/165 ,  G01R25/04 ,  G01R31/31713 ,  G01R31/31715 ,  G01R31/31724 ,  G01R31/31725 ,  G01R31/318328 ,  G04F10/005

摘要： Disclosed is a fan-out buffer which includes a first channel that includes a first delay circuit adjusting a first delay time of a calibration test signal depending on a first delay control signal, a second channel that includes a second delay circuit adjusting a second delay time of the calibration test signal depending on a second delay control signal, a first edge-to-pulse converter that detects a first edge included in a first time domain reflectometry (TDR) waveform of an output terminal of the first channel and generates a first start pulse signal including a first pulse, a second edge-to-pulse converter that generates a second start pulse signal including a second pulse, a stop pulse signal generator that generates a stop pulse signal including a first stop pulse, and a first delay control signal generator that calculates a phase difference generates the first delay control signal.