On-die termination circuit and driving method thereof
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United States of America Patent
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Dec 7, 2010
Grant Date -
May 21, 2009
app pub date -
Jan 20, 2009
filing date -
Sep 27, 2006
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Abstract
An on-die termination circuit is capable of increasing a resolution without enlargement of a chip or a layout size. The on-die termination circuit includes a control means, a termination resistance supply means, a code signal generating means. The control means sequentially generates a plurality of control signals in a response to a driving signal. The termination resistance supply means supplies a termination resistance in response to a coarse code signal having a plurality of bits and a fine code signal having a plurality of bits. The code signal generating means controls the fine code signal and the coarse code signal in response to the plurality of the control signals in order that the termination resistance has a level which is correspondent to an input resistance.
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