US 11,869,567 B2
Refresh control circuit and memory
Xianlei Cao, Hefei (CN)
Assigned to CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed by CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed on Jan. 6, 2022, as Appl. No. 17/647,234.
Application 17/647,234 is a continuation of application No. PCT/CN2021/120355, filed on Sep. 24, 2021.
Claims priority of application No. 202110276359.1 (CN), filed on Mar. 15, 2021.
Prior Publication US 2022/0293167 A1, Sep. 15, 2022
Int. Cl. G11C 16/04 (2006.01); G11C 11/406 (2006.01); G11C 11/408 (2006.01)
CPC G11C 11/40611 (2013.01) [G11C 11/408 (2013.01); G11C 11/4085 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A refresh control circuit, comprising:
a random output sub-circuit, configured to:
sequentially receive a plurality of single-row addresses, wherein the plurality of single-row addresses comprise n single-row addresses and m single-row addresses in L single-row addresses, a single enabling duration of word lines pointed to by the n single-row addresses is greater than a preset duration, the m single-row addresses rank top m in occurrence frequency, the L single-row addresses are corresponding to word lines turned on between adjacent refresh commands, n is a natural number, and m is a positive integer; and
receive a first random number, the first random number being a positive integer less than or equal to n+m, and after receiving the first random number, output an i-th received single-row address, wherein i is equal to the first random number;
a row hammer address generation sub-circuit, connected to an output end of the random output sub-circuit, and configured to output a row hammer address corresponding to the received single-row address; and
a signal selector, configured to receive a general refresh address and the row hammer address, and output address information, wherein the address information is the row hammer address or the address information is the row hammer address and the general refresh address, and the address information acts as a refresh object corresponding to the refresh command.