US 12,217,813 B2
Apparatuses and methods for tracking word line accesses
Dong Pan, Boise, ID (US)
Filed by Lodestar Licensing Group LLC, Evanston, IL (US)
Filed on Aug. 24, 2022, as Appl. No. 17/822,033.
Application 17/822,033 is a division of application No. 17/102,266, filed on Nov. 23, 2020, granted, now 11,462,291.
Prior Publication US 2022/0415427 A1, Dec. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G11C 29/42 (2006.01); G11C 7/06 (2006.01); G11C 11/406 (2006.01); G11C 29/12 (2006.01); G11C 29/20 (2006.01); G11C 29/44 (2006.01)
CPC G11C 29/42 (2013.01) [G11C 7/065 (2013.01); G11C 11/40611 (2013.01); G11C 29/20 (2013.01); G11C 29/44 (2013.01); G11C 2029/1202 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a memory array comprising a plurality of word lines, wherein each of the plurality of word lines comprises a plurality of count value memory cells configured to store a plurality of values each representing a number of activations of a corresponding one of the plurality of word lines;
a count control circuit configured to receive a value of the plurality of values from the plurality of count value memory cells of a word line of the plurality of word lines when the word line is activated, compare the value to a threshold value and activate a trigger signal when the value is equal to or greater than the threshold value; and
a refresh control circuit configured to latch a current row address and perform a targeted refresh operation when the active trigger signal is received.