Integrated circuit comprising a delay-locked loop
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United States of America Patent
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Oct 13, 2015
Grant Date -
May 16, 2013
app pub date -
Nov 14, 2012
filing date -
Nov 15, 2011
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Abstract
Embodiments of an integrated circuit (IC) comprising a delay-locked loop (DLL) are described. Some embodiments include first circuitry to generate a first clock signal by delaying an input clock signal by a first delay, second circuitry to determine a code based on the input clock signal and the first clock signal, and third circuitry to produce an output clock signal based on the input clock signal and the code. In some embodiments, the power consumption of the DLL circuitry is reduced by powering down at least some parts of the DLL circuitry for most of the time. In some embodiments, the clock signal that is used to clock the command-and-address circuitry of a memory device is used to clock the on-die-termination latency counter circuitry.
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