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US08483985B2 PLL loop bandwidth calibration 有权
PLL环路带宽校准

PLL loop bandwidth calibration
Abstract:
Systems and methodologies are described that facilitate calibration of the loop bandwidth of a phase-locked loop (PLL). Calibration for the loop bandwidth of a PLL as described herein can be performed by optimizing the loop response of the PLL. Optimization of the loop response of the PLL can be achieved by modifying the value of a feedback counter of the PLL to induce a loop response at the PLL. The loop response of the PLL can be measured and compared to an ideal loop response. Based on this comparison, appropriate adjustments can be made to the PLL. Further, various techniques described herein facilitate calibration of a PLL by adjusting only parameters of a charge pump of the PLL without requiring individual control mechanisms for each element of the PLL, thereby improving PLL performance and manufacturing yield.
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