US 12,254,953 B2
Calibration device and memory device including the calibration device for a high-speed data I/O operation under a low power condition
In Seok Kong, Gyeonggi-do (KR); Chan Keun Kwon, Gyeonggi-do (KR); Hee Jun Kim, Gyeonggi-do (KR); Sung Ah Lee, Gyeonggi-do (KR); Jung Hwan Lee, Gyeonggi-do (KR); Jun Seo Jang, Gyeonggi-do (KR); and Jae Hyeong Hong, Gyeonggi-do (KR)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Aug. 10, 2023, as Appl. No. 18/447,311.
Claims priority of application No. 10-2023-0041085 (KR), filed on Mar. 29, 2023.
Prior Publication US 2024/0331742 A1, Oct. 3, 2024
Int. Cl. G11C 7/10 (2006.01)
CPC G11C 7/1048 (2013.01) [G11C 2207/2254 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A calibration device coupled to a communication line shared by plural devices, wherein the calibration device is configured to:
perform an iterative eye width scanning by adjusting a set voltage level by a preset level from a first voltage level to a reference center voltage level, wherein the first voltage level corresponds to a cross point where values of signals or data, which are transmitted via the communication line, are changed in different directions; and
set, as a zero crossing for the signals or the data, a voltage level corresponding to a largest value among a plurality of eye widths obtained through the iterative eye width scanning.