System and method for minimizing delay variation in double data rate strobes

The invention relates to a system and method for minimizing delay variation between multiple double data rate strobes. More particularly, the present invention enables the calibration of circuits used to transfer data from memory to a memory controller upon system startup to control for on-die variations in the circuits and to periodically re-calibrate the circuits to compensate for voltage and temperature variations seen during operation of the circuit with minimal interference in the normal transfer of data from memory to the memory controller. A system and method in which delay strobe variation in a double data rate device is calibrated by first individually calibrating all slave strobe delay devices at system startup. Thereafter, a master strobe delay device is activated periodically to determine an incremental delay adjustment. This incremental delay adjustment is then used to by the slave strobe delay devices to modify the calibration value performed by the slave strobe delay devices upon startup. In this manner, individual on-die variations are compensated for each slave strobe delay device and variations due to voltage and temperature changes are compensated for without effecting the normal operation of the slave strobe devices.