Comments on 'folding of phase noise spectra in charge-pump phase-locked loops induced by frequency division'

Abstract

Spectrum folding of the voltage-controlled oscillator's phase noise in a charge-pump phase-locked loop (CP-PLL) has been shown by Levantino et al. to impose a lower bound for the in-band noise floor. This manuscript adds two further contributions to their work: (i) it corrects an approximation error in their original manuscript and (ii) it highlights the additional elevated mid-and high-frequency noise contributions in the wideband case.

Publication Title

2016 IEEE International Conference on Electronics, Circuits and Systems, ICECS 2016

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