Efficient calibration of memory devices

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United States of America Patent

PATENT NO 9620184
SERIAL NO

14970798

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Abstract

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A system and method for efficient data eye training reduces the time and resources spent calibrating one or more memory devices. A reference voltage (Vref) calibration mechanism reduces the time and resources for calibration by reducing the number of tests needed to sufficiently determine the boundaries of the data eye of the memory device by using a combination of small steps and small steps to find a preferred reference voltage. In one example, the Vref calibration mechanism uses small steps of the reference voltage in a first range above a nominal reference voltage to find a maximum eye width then uses small steps to more precisely find the maximum eye width. If a maximum reference voltage is found in the first range then the second range below the nominal reference voltage does not need to be tested thereby saving additional time and resources.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bialas,, Jr John S South Burlington, US 10 57
Cadigan, David D Poughkeepsie, US 27 112
Glancy, Stephen P Poughkeepsie, US 18 111
Maule, Warren E Cedar Park, US 156 3129
Van, Huben Gary A Poughkeepsie, US 51 1313

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