US 11,721,383 B2
Refresh circuit and refresh method of a semiconductor memory having a signal generation module configured to generate an inversion signal and carry signals based on a refresh command; an adjustment unit to generate an inversion adjustment signal according to the inversion
Jixing Chen, Hefei (CN)
Assigned to CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed by CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed on Apr. 7, 2022, as Appl. No. 17/658,287.
Claims priority of application No. 202111210522.0 (CN), filed on Oct. 18, 2021.
Prior Publication US 2023/0120815 A1, Apr. 20, 2023
Int. Cl. G11C 11/406 (2006.01); H03K 3/0233 (2006.01); G11C 11/4093 (2006.01)
CPC G11C 11/40615 (2013.01) [G11C 11/4093 (2013.01); G11C 11/40618 (2013.01); H03K 3/0233 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A refresh circuit, comprising:
a signal generation module, configured to generate an inversion signal and a carry signal based on a refresh command, wherein the refresh command is used to sequentially generate a first refresh signal and a second refresh signal, the first refresh signal and the second refresh signal each generate the inversion signal, and the carry signal is generated based on the second refresh signal;
an adjustment unit, configured to generate, when the first refresh signal and the second refresh signal are generated based on the refresh command, an inversion adjustment signal according to the inversion signal, and generate, when only the first refresh signal is generated based on the refresh command, the inversion adjustment signal according to an inversion signal corresponding to a first refresh signal generated based on a current refresh command, and generate the inversion adjustment signal only according to an inversion signal corresponding to a second refresh signal generated based on a next refresh command; and
a counting module, configured to generate a first output signal and a second output signal, and invert the first output signal based on the inversion adjustment signal, and cumulatively add the second output signal based on the carry signal, wherein data with the second output signal as a high order and the first output signal as a low order is used to characterize a refresh count based on the refresh command.