Refresh control device

摘要

A refresh control device may include a fuse array configured to store fuse data. The refresh control device may include a refresh controller including cell arrays including unit cells. The refresh controller may be configured to store position information of a word line having weak cell characteristics based on fuse data. The refresh control device may include a comparator configured to receive data from the cell arrays of a selected cell and may be configured to compare the data to determine the presence of a weak word line to either perform or skip the refresh operation on the corresponding cell.

主权项

1. A refresh control device comprising:
a fuse array configured to store fuse data corresponding to cell characteristic information; a refresh controller including unit cells and configured to store the fuse data received from the fuse array in each unit cell during a boot-up operation, and output weak cell information stored in a unit cell as two or more data based on a refresh address; a comparator configured to compare at least two data received from the refresh controller with each other, and output a comparison signal; a combination circuit configured to output a counting signal based on the comparison signal; and a refresh counter configured to count the counting signal such that the refresh address for controlling a refresh operation is output to the refresh controller.