Apparatuses and methods for phase interpolating clock signals and for providing duty cycle corrected clock signals
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United States of America Patent
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May 7, 2019
Grant Date -
Jan 4, 2018
app pub date -
Sep 14, 2017
filing date -
Jul 8, 2013
priority date (Note) -
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Abstract
Apparatuses and methods for phase interpolating clock signals and for providing duty cycle corrected clock signals are described. An example apparatus includes a clock generator circuit configured to provide first and second clock signals responsive to an input clock signal. A duty phase interpolator circuit may be coupled to the clock generator circuit and configured to provide a first and second duty cycle corrected interpolated clock signals. A duty cycle adjuster circuit may be coupled to the duty phase interpolator circuit and configured to receive the first and second duty cycle corrected interpolated clock signals and provide a duty cycle corrected clock signal responsive thereto. A duty cycle detector may be coupled to the duty cycle adjuster circuit and configured to detect duty cycle error of the duty cycle corrected clock signal and provide the adjustment signals to correct the duty cycle error.
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