2023
DOI: 10.1109/access.2023.3265726
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A Resolution Control Loop for TDC-Based Phase Detectors in ADPLLs

Abstract: This paper proposes a resolution control loop that runs in background to control the time resolution of a mid-rise Time to Digital Converter (TDC) used as a phase detector in All-Digital Phase Locked Loops (ADPLLs). The proposed resolution control loop minimizes the TDC resolution until the TDC linear dynamic range equals the range of the input time error. Consequently, PLL in-band phase noise is reduced due to reduction of the Power Spectral Density (PSD) of the TDC quantization noise. Moreover, the linearity… Show more

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Cited by 2 publications
(1 citation statement)
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“…Because the pulse train low-pass filter counting method is a relatively complex nonlinear processing method, it is difficult to make a linear approximation. Therefore, the analysis method of the system transfer function cannot be used to determine the design parameters of the phase-locked loop, and the decoupling control and analysis of the high-order digital phase-locked loop performance indicators cannot be realized, which cannot meet the high application requirements [12], [13].…”
Section: Introductionmentioning
confidence: 99%
“…Because the pulse train low-pass filter counting method is a relatively complex nonlinear processing method, it is difficult to make a linear approximation. Therefore, the analysis method of the system transfer function cannot be used to determine the design parameters of the phase-locked loop, and the decoupling control and analysis of the high-order digital phase-locked loop performance indicators cannot be realized, which cannot meet the high application requirements [12], [13].…”
Section: Introductionmentioning
confidence: 99%