公开(公告)号：US20240321338A1

公开(公告)日：2024-09-26

申请号：US18529283

申请日：2023-12-05

Applicant: Samsung Electronics Co., Ltd.

Inventor： Kideok HAN ,  Ki-Seok PARK ,  Young-Hoon SON ,  Do-Han KIM ,  Min-Su BAE ,  Yoenhwa LEE ,  Insu CHOI

IPC: G11C11/4076 ,  G11C11/4096

CPC classification number: G11C11/4076 ,  G11C11/4096

Abstract: A training method of a memory device adjusting an eye window of a data signal in response to a duty cycle adjuster (DCA) includes performing a first training operation that selects a first DCA code corresponding to a first internal clock signal having a phase difference of 180° relative to a reference internal clock signal, and performing a second training operation that selects a second DCA code and a third DCA code respectively corresponding to a second internal clock signal and a third internal clock signal having a phase difference of 90° and 270° relative to reference internal clock signal. In the first training operation, the eye window size of the data signal is measured in units of two unit intervals, and in the second training operation, the eye window size of the data signal is measured in units of one unit interval.