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Modulation Configurations of Phase Locked Loops for High-Speed and High-Precision Wired and Wireless Applications

Masaru KOKUBO

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Summary :

This paper summarizes the modulation configurations of phase locked loops (PLLs) and their integration in semiconductor circuits, e.g., the input modulation for cellular phones, direct-modulation for low power wireless sensor networks, feedback-loop modulation for high-speed transmission, and two-point modulation for short-range radio transceivers. In this survey, basic configuration examples of integrated circuits for wired and wireless applications which are using the PLL modulation configurations are explained. It is important to select the method for simply and effectively determining the characteristics corresponding to the specific application. The paper also surveys technologies for future PLL design for digitizing of an entire PLL to reduce the phase noise due to a modulation by using a feedback loop with a precise digital phase comparison and a numerically controlled oscillator with high linearity.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E106-A No.5 pp.817-822
Publication Date
2023/05/01
Publicized
2022/11/25
Online ISSN
1745-1337
DOI
10.1587/transfun.2022GCI0001
Type of Manuscript
Special Section INVITED PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category

Authors

Masaru KOKUBO
  Hitachi Ltd.

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