Control voltage tracking circuits, methods for recording a control voltage for a clock synchronization circuit and methods for setting a voltage controlled delay
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United States of America Patent
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Jan 25, 2011
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N/A
app pub date -
Sep 23, 2008
filing date -
Sep 23, 2008
priority date (Note) -
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Abstract
Memories, clock synchronization circuits, clock synchronization controller circuits, and methods for setting a voltage controlled delay of a clock synchronization circuit and tracking and recording the control voltage are disclosed. For example, a clock synchronization controller provides an initial control voltage to the voltage controlled delay during initialization of the synchronization circuit until a phase dependent control voltage stabilizes. The stable phase dependent control voltage is substituted for the initial control voltage. Following stabilization of the phase dependent control voltage, a phase detector of the clock synchronization circuit is activated. A recovery control voltage is provided by the clock synchronization controller to the voltage controlled delay during recovery of the clock synchronization from a power-saving mode until the phase dependent control voltage stabilizes.
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