US 12,315,547 B2
Refresh operation in multi-die memory
Matthew A. Prather, Boise, ID (US); and Thomas H. Kinsley, Boise, ID (US)
Filed by Lodestar Licensing Group LLC, Evanston, IL (US)
Filed on Sep. 26, 2023, as Appl. No. 18/373,120.
Application 18/373,120 is a continuation of application No. 17/379,422, filed on Jul. 19, 2021, granted, now 11,783,882.
Application 17/379,422 is a continuation of application No. 16/562,940, filed on Sep. 6, 2019, granted, now 11,069,394, issued on Jul. 20, 2021.
Prior Publication US 2024/0170035 A1, May 23, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G11C 11/406 (2006.01); G11C 7/10 (2006.01); G11C 11/407 (2006.01)
CPC G11C 11/40611 (2013.01) [G11C 7/1072 (2013.01); G11C 11/407 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
issuing a first refresh command to a first rank of a memory device;
delaying issuance of a second refresh command to a second rank of the memory device by a duration, wherein delaying the issuance of the second refresh command limits a maximum refresh current of the memory device, wherein the duration is based at least in part on a product between a value and a refresh cycle time associated with refresh operations at the memory device; and
issuing the second refresh command to the second rank after expiration of the duration.