Patent ID: 8023347
Filing Date: 2011-09-20
Classification: G11C

Abstract:
1. A repair control circuit, comprising: a data mask signal input unit configured to buffer a data mask signal from the outside, and output a buffered data mask signal and a pump enable signal in response to a test control signal for a repair; a repair voltage pumping unit configured to pump a supply voltage and a back-bias voltage to generate a repair voltage in response to the pump enable signal; a cell address enable unit configured to enable a cell address of a cell to be repaired in response to a repair address and the buffered data mask signal; a repair enable unit configured to code the cell address output from the cell address enable unit to generate a repair enable signal and a drive signal according to whether or not a cell corresponding to the cell address is enabled, wherein the repair enable unit comprises a plurality of row repair enable units whose number corresponds to the number of a row address and a plurality of column repair enable units whose number corresponds to the number of a column address; and a repair unit configured to supply the repair voltage to the cell when the repair enable signal and the cell address are enabled in a state that the drive signal is enabled.