Search for impedance calibration

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United States of America Patent

PATENT NO 9531382
SERIAL NO

14842032

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Abstract

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A non-volatile storage system includes an impedance code calibration circuit. The device has a first variable impedance circuit and a second variable impedance circuit coupled to a calibration node. The device has a control circuit configured to access a previous impedance code for a previous impedance calibration and to divide the previous impedance code into a main impedance code and a remainder impedance code. The control circuit is configured to perform a search for a new impedance code starting with the main impedance code applied to the first variable impedance circuit while maintaining the remainder impedance code to the second variable impedance circuit. The control circuit is configured to add the final impedance code for the first variable impedance circuit with the remainder impedance code to produce a new impedance code for the impedance calibration.

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Patent Owner(s)

Patent OwnerAddress
SANDISK TECHNOLOGIES INC951 SANDISK DRIVE LEGAL DEP MILPITAS CA 95035

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Addepalli, Sravanti Bengaluru, IN 5 80
Miwa, Hitoshi Kamakura, JP 93 2140
Yadala, Sridhar Bengaluru, IN 26 271

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