US Patent 10157658 Refresh control device

A refresh control device for reducing power consumption during a target row refresh operation is disclosed. The refresh control device includes a refresh address generator configured to generate a refresh address by selecting any one of a target row refresh address and a normal refresh address according to a target row refresh flag signal, an address control signal generator configured to generate a multiple address control signal in response to the target row refresh flag signal and a multiple refresh signal, and a final refresh address generator configured to generate a plurality of final refresh addresses from the refresh address in response to the multiple address control signal.