US 11,749,338 B2
Memory device adjusting duty cycle and memory system having the same
Dae-Sik Moon, Suwon-si (KR); Gil-Hoon Cha, Hwaseong-si (KR); Ki-Seok Oh, Seoul (KR); Chang-Kyo Lee, Seoul (KR); Yeon-Kyu Choi, Seoul (KR); Jung-Hwan Choi, Hwaseong-si (KR); Kyung-Soo Ha, Hwaseong-si (KR); and Seok-Hun Hyun, Seongnam-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jul. 29, 2022, as Appl. No. 17/816,138.
Application 17/816,138 is a continuation of application No. 17/807,163, filed on Jun. 16, 2022.
Application 17/807,163 is a continuation of application No. 17/564,564, filed on Dec. 29, 2021, granted, now 11,423,971.
Application 17/564,564 is a continuation of application No. 17/148,915, filed on Jan. 14, 2021, granted, now 11,393,522, issued on Jul. 19, 2022.
Application 17/148,915 is a continuation of application No. 16/230,185, filed on Dec. 21, 2018, granted, now 10,923,175, issued on Feb. 16, 2021.
Claims priority of application No. 10-2018-0012423 (KR), filed on Jan. 31, 2018; and application No. 10-2018-0062094 (KR), filed on May 30, 2018.
Prior Publication US 2022/0383931 A1, Dec. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G11C 11/40 (2006.01); G11C 11/4076 (2006.01); G11C 11/409 (2006.01); G06F 3/06 (2006.01); G11C 7/22 (2006.01)
CPC G11C 11/4076 (2013.01) [G06F 3/0604 (2013.01); G06F 3/0653 (2013.01); G06F 3/0659 (2013.01); G06F 3/0673 (2013.01); G11C 7/222 (2013.01); G11C 11/409 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for performing a duty adjustment operation, the method comprising:
performing a first duty adjustment operation on a write clock, the first duty adjustment operation including:
transmitting the write clock to an external device;
receiving a first duty monitoring information from the external device, the first duty monitoring information representing a result of monitoring duty cycle of the write clock; and
generating a first duty control signal based on the first duty monitoring information and transmitting the first duty control signal to the external source for adjusting the duty cycle of the write clock in the external device; and
performing a second duty adjustment operation on a read clock, the second duty adjustment operation including:
receiving a read clock generated based on the write clock and a second duty monitoring information from the external device, the second duty monitoring information representing a result of monitoring a duty cycle of the read clock; and
generating a second duty control signal based on the second duty monitoring information and transmitting the second duty control signal to the external source for adjusting the duty cycle of the read clock in the external device.