Impedance adjustment in a memory device
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United States of America Patent
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Nov 27, 2018
Grant Date -
Feb 1, 2018
app pub date -
Oct 2, 2017
filing date -
Aug 29, 2013
priority date (Note) -
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Abstract
Methods include configuring termination devices of a driver circuit of a memory device, storing a first plurality of trim values representative of the configuration of the termination devices of the driver circuit, transferring a second plurality of trim values to a different memory device, and configuring a plurality of termination devices of a driver circuit of the different memory device in response to the second plurality of trim values. Methods further include determining configuration information corresponding to a configuration of a particular driver circuit of a memory device adjusted to a desired impedance, storing a first set of trim values representative of the configuration information, and adjusting an impedance of a different driver circuit of the memory device in response to the first set of trim values and a correction factor representative of expected differences in characteristics between the particular driver circuit and the different driver circuit.
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