基于优化的压控振荡器和低电流失配电荷泵的0.20—2.43 GHz分数分频频率合成器

邹维; 任达明; 邹雪城

doi:10.1631/FITEE.1900653

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基于优化的压控振荡器和低电流失配电荷泵的0.20—2.43 GHz分数分频频率合成器

常规文章 | Updated：2022-05-19

- 基于优化的压控振荡器和低电流失配电荷泵的0.20—2.43 GHz分数分频频率合成器
- A 0.20–2.43 GHz fractional-N frequency synthesizer with optimized VCO and reduced current mismatch CP
- 信息与电子工程前沿（英文） 2021年22卷第2期页码：251-261
- Affiliations：
  
  School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
- Author bio：
  
  Wei ZOU, E-mail: weizou@hust.edu.cn
  [ "Daming REN, E-mail: damingren@hust.edu.cn" ]
  [ "Xuecheng ZOU, E-mail: estxczou@hust.edu.cn" ]
- Funds：
  
  Project supported by the National Natural Science Foundation of China (No. 61376031)
- DOI：10.1631/FITEE.1900653
  中图分类号： TN453
- 收稿：2019-11-29，
  
  修回：2020-10-27，
  
  网络出版：2021-01-08，
  
  纸质出版：2021-02
- Accepted：
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邹维, 任达明, 邹雪城. 基于优化的压控振荡器和低电流失配电荷泵的0.20—2.43 GHz分数分频频率合成器[J]. 信息与电子工程前沿（英文）, 2021,22(2):251-261.

Wei ZOU, Daming REN, Xuecheng ZOU. A 0.20–2.43 GHz fractional-N frequency synthesizer with optimized VCO and reduced current mismatch CP[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(2): 251-261.
邹维, 任达明, 邹雪城. 基于优化的压控振荡器和低电流失配电荷泵的0.20—2.43 GHz分数分频频率合成器[J]. 信息与电子工程前沿（英文）, 2021,22(2):251-261. DOI： 10.1631/FITEE.1900653.

Wei ZOU, Daming REN, Xuecheng ZOU. A 0.20–2.43 GHz fractional-N frequency synthesizer with optimized VCO and reduced current mismatch CP[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(2): 251-261. DOI： 10.1631/FITEE.1900653.

摘要

提出一种适用于多标准无线通信系统的0.20—2.43 GHz分数分频频率合成器方案，该方案采用低相位噪声压控振荡器和低电流失配电荷泵。由于压控振荡器的性能决定了锁相环型频率合成器的带外相位噪声，利用自动幅度控制技术和高品质因数的8字型电感对压控振荡器进行优化。为改善电荷泵电流匹配性能以及减小锁相环相位误差，提出一种具有失配抑制结构的电荷泵。通过理论分析，研究了电流失配对锁相环输出性能的影响。采用台积电0.18-μm CMOS工艺，模型输出频率从0.20 GHz变化到2.43 GHz。这一锁相环型频率合成器在2.43 GHz载波时实现的带内相位噪声为−96.8 dBc/Hz，带外相位噪声为−122.8 dBc/Hz。在最坏情况下，均方根抖动为1.2 ps，测量的参考杂散小于−65.3 dBc。消耗电流15.2 mA，芯片面积为850μm×920μm。

Abstract

A 0.20–2.43 GHz fractional-

frequency synthesizer is presented for multi-band wireless communication systems

in which the scheme adopts low phase noise voltage-controlled oscillators (VCOs) and a charge pump (CP) with reduced current mismatch. VCOs that determine the out-band phase noise of a phase-locked loop (PLL) based frequency synthesizer are optimized using an automatic amplitude control technique and a high-quality factor figure-8-shaped inductor. A CP with a mismatch suppression architecture is proposed to improve the current match of the CP and reduce the PLL phase errors. Theoretical analysis is presented to investigate the influence of the current mismatch on the output performance of PLLs. Fabricated in a TSMC 0.18-μm CMOS process

the prototype operates from 0.20 to 2.43 GHz. The PLL synthesizer achieves an in-band phase noise of -96.8 dBc/Hz and an out-band phase noise of -122.8 dBc/Hz at the 2.43-GHz carrier. The root-mean-square jitter is 1.2 ps under the worst case

and the measured reference spurs are less than -65.3 dBc. The current consumption is 15.2 mA and the die occupies 850 μm×920 μm.

关键词

Keywords

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