A novel segmentation scheme for DTC-based ΔΣ fractional-N PLL

@article{Vo2017ANS,
  title={A novel segmentation scheme for DTC-based ΔΣ fractional-N PLL},
  author={Tuan Minh Vo and Carlo Samori and Andrea L. Lacaita and Salvatore Levantino},
  journal={2017 IEEE International Symposium on Circuits and Systems (ISCAS)},
  year={2017},
  pages={1-4}
}
The adoption of the digital/time converter (DTC) circuit has improved the performance of ΔΣ fractional-N phase-locked loops (PLLs). Accurate cancellation of ΔΣ quantization error via the DTC requires an automatic calibration made by an LMS loop. A high-order ΔΣ speeds up calibration convergence and improves PLL spectral purity, though at the price of larger quantization error and wider DTC range. To overcome this problem, we propose an innovative parallel segmentation scheme which reduces the… CONTINUE READING