More Discussions on Intrinsic Frequency Detection Capability of Full-Rate Linear Phase Detector in Clock and Data Recovery

Byun, Sangjin

doi:10.3390/electronics7060093

Cited by 2 publications

(1 citation statement)

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“…Phase-locked loop is also extensively used in distribution grids and high-voltage DC transmission systems [4][5][6]. Compared with other orders of PLL, the second-order PLL is more preferred in actual engineering due to its absolute stability and easy implementation [7,8].…”

Section: Introductionmentioning

confidence: 99%

New Nonlinear Second-Order Phase-Locked Loop with Adaptive Bandwidth Regulation

2018

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Synchronization of large acquisition bandwidth brings great challenges to the traditional second-order phase-locked loop (PLL). To address the contradiction between acquisition bandwidth and noise suppression capability of the traditional PLL, a new second-order PLL coupled with a nonlinear element is proposed. The proposed nonlinear second-order PLL regulates the loop noise bandwidth adaptively by the nonlinear module. When a large input–output phase error occurs, this PLL reduces the frequency offset quickly by taking advantage of the large bandwidth. When the phase error is reduced by the loop control, the proposed PLL suppresses noises by using the small bandwidth to increase the tracking accuracy. Simulation results demonstrate that the tracking speed of the proposed PLL is increased considerably, and its acquisition bandwidth is increased to 18.8 kHz compared with that of the traditional second-order PLL (4 kHz).

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