CALIBRATION DEVICES AND OPERATING METHODS THEREOF

Abstract: disclosed is a memory device which includes a driver unit that includes a pull-up driver and a pull-down driver, a zq calibration unit that performs zq calibration with respect to the driver unit based on an external resistor and a first reference voltage and generates a first zq code corresponding to the first reference voltage, and a code conversion unit that generates a second zq code corresponding to a second reference voltage different from the first reference voltage, based on the first zq code.

Inventor(s): Jichull Jeong, Youngwoo Park, Seungjin Park, Jindo Byun, Seunghoon Lee, Eunsang Lee, Chaekang Lim

CPC Classification: G11C7/14 (STATIC STORES (semiconductor memory devices ))

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