Patent attributes
A smart refresh device includes an address control block configured to determine whether a specific row address is a row hammer address, and invert a first row hammer address and perform an addition/subtraction of an address; a repair control block configured to determine whether the row hammer address is a repaired address and output a stored repair address as a second repair control signal; a repair address storage block configured to store an output address of the address control block and output a stored address as a latch address; a fuse block configured to output a repair signal representing information on a repair address to the repair control block, and output a decoding signal according to the latch address; and an operator configured to add and subtract the decoding signal according to an addition signal and a subtraction signal.
