Digital controller for a phase-locked loop
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United States of America Patent
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Jul 4, 2017
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app pub date -
Jul 29, 2016
filing date -
Jul 29, 2016
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Abstract
A digital control loop circuit is disclosed which is coupleable to an oscillator to form a configurable, digital phase-locked loop to generate an output signal having a configurable or selectable output frequency. A representative embodiment of the digital control loop circuit may include a memory storing a plurality of configuration parameters, at least one configuration parameter specifying the output frequency; and a digital controller coupleable to receive an input signal from a reference frequency generator having a reference frequency, the digital controller adapted to access the memory and retrieve the plurality of configuration parameters, and to generate a plurality of control signals to the oscillator both to generate the output signal having the output frequency in response to the plurality of configuration parameters, and to match a phase of the output signal to an input signal phase.
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