US 12,283,303 B2
Electronic device performing refresh operation
Dae Joon Kim, Icheon-si (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Apr. 29, 2022, as Appl. No. 17/733,317.
Claims priority of application No. 10-2022-0001200 (KR), filed on Jan. 4, 2022.
Prior Publication US 2023/0215485 A1, Jul. 6, 2023
Int. Cl. G11C 11/406 (2006.01); G11C 11/408 (2006.01); G11C 11/4096 (2006.01)
CPC G11C 11/40615 (2013.01) [G11C 11/40622 (2013.01); G11C 11/4085 (2013.01); G11C 11/4096 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a count signal generation circuit configured to increase one of values of a weak cell count signal and an active count signal by comparing a weak cell address with an adjacent address generated from a row address, when an active operation is performed; and
a target refresh control circuit configured to:
latch the adjacent address based on the values of the weak cell count signal and the active count signal, and
output the latched adjacent address as a target address for a refresh operation based on a target refresh signal,
wherein, the weak cell address is a location of a weak cell, which is a memory cell with relatively low data retention characteristics.