METHODS AND SYSTEMS FOR CASCADED PHASE-LOCKED LOOPS (PLLS)
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United States of America Patent
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Nov 24, 2016
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May 20, 2016
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May 22, 2015
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Abstract
Systems and methods are provided for cascaded phase-locked loops (PLLs). A plurality of phase-locked loops (PLLs) arranged in a cascaded manner may be used in providing enhanced signal generation. Each PLL generates an output based on a corresponding input and a feedback signal. The input to a first one of plurality of cascaded phase-locked loops (PLLs) comprises an input reference signal; the input to each remaining one of the plurality of the cascaded phase-locked loops (PLLs) corresponds to an output of a preceding one of the plurality of the cascaded phase-locked loops (PLLs); and the output of a last one of the plurality of cascaded phase-locked loops (PLLs) corresponds to an overall output signal of the plurality of cascaded phase-locked loops (PLLs). The frequency of the overall output signal is set based on the one or more adjustments applied in each one of the plurality of cascaded phase-locked loops (PLLs).
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