Double calibration loop for random spread spectrum modulator
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United States of America Patent
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Jul 18, 2017
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Jul 6, 2017
app pub date -
Jan 4, 2016
filing date -
Jan 4, 2016
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Abstract
Representative implementations of devices and techniques provide calibration for a spread spectrum PLL device modulator. A first calibration loop includes a cross correlator to correlate a sequence of random or pseudo-random signals injected into a signal path of the PLL device to a phase error signal of the PLL device. A second calibration loop includes a bandwidth tuner to tune a bandwidth of the PLL device and to reduce a jitter of the PLL device.
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