采用两步式数字校准的低温漂松弛振荡器

裴磊; 韩佳利; 张程跃; 齐欢欢; 张杰; 许江涛; 王晓飞; 张鸿

doi:10.7652/xjtuxb202408017

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采用两步式数字校准的低温漂松弛振荡器

—————————————————————— | 更新时间：2025-07-28

- 采用两步式数字校准的低温漂松弛振荡器
- A High-Precision Low-Power and Low-Temperature-Drift Relaxation Oscillator with Two-Step Digital Calibration
- 西安交通大学学报 2024年58卷第8期页码：166-174
- 作者机构：
  
  西安交通大学微电子学院,西安,710049
- 作者简介：
  
  : 2024-01-09。作者简介: 裴磊(2000—),男,硕士生
  张鸿(通信作者),男,教授。基金项目: 国家自然科学基金资助项目(62174149)
- 基金信息：
  
  : 2024-01-09。作者简介: 裴磊(2000—),男,硕士生;张鸿(通信作者),男,教授。基金项目: 国家自然科学基金资助项目(62174149);国家重点研发计划资助项目(2022YFC2404902)。
- DOI：10.7652/xjtuxb202408017
  中图分类号： TN432
- 网络首发：2024-08-10，
  
  纸质出版：2024
- 稿件说明：
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裴磊, 韩佳利, 张程跃, 等. 采用两步式数字校准的低温漂松弛振荡器[J]. 西安交通大学学报, 2024,58(8):166-174.

PEI Lei, HAN Jiali, ZHANG Chengyue, et al. A High-Precision Low-Power and Low-Temperature-Drift Relaxation Oscillator with Two-Step Digital Calibration[J]. 2024, 58(8): 166-174.
裴磊, 韩佳利, 张程跃, 等. 采用两步式数字校准的低温漂松弛振荡器[J]. 西安交通大学学报, 2024,58(8):166-174. DOI： 10.7652/xjtuxb202408017.

PEI Lei, HAN Jiali, ZHANG Chengyue, et al. A High-Precision Low-Power and Low-Temperature-Drift Relaxation Oscillator with Two-Step Digital Calibration[J]. 2024, 58(8): 166-174. DOI： 10.7652/xjtuxb202408017.

摘要

针对传统片上振荡器设计面临的时钟频率难以实现高精度校准的问题

提出基于二分搜索法的数字校准方法

实现了振荡频率校准并提高了校准的线性度。校准算法采用了粗校准加细校准的两步式校准过程

大大增加了频率校准范围。针对振荡频率的温度漂移问题

提出了新的温度补偿方案

在传统一阶温度补偿的基础上

增加了亚阈值电流自补偿的高阶补偿机制

大大降低了温度变化对输出频率的影响。在校准电路的设计中

合理设置开关电阻阵列的温度系数以保证输出频率的校准不影响输出频率的温度稳定性。对振荡器版图提取了寄生参数

并进行了仿真

仿真结果表明:经过所提频率校准和温度补偿方案

典型情况下振荡频率误差小于0.04%; 在-40～125 ℃温度范围内频率误差小于±0.12%; 2.5～5.5 V电源电压范围内频率随电源电压变化误差小于±0.13%; 电路工作电流为47.6 μA

完成一次校准时长不超过2.7 ms。该振荡器可用于物联网、处理器等应用

可以取代片外晶体振荡器

能够降低系统成本和体积。

Abstract

Given the difficulty in achieving high-precision clock frequency calibration of traditional on-chip oscillators

this study proposes a digital calibration method based on a binary search algorithm and realizes frequency calibration with high linearity for a relaxation oscillator. The calibration algorithm adopts a two-step calibration approach

consisting of coarse calibration and fine calibration

which significantly expands the frequency calibration range. To solve the problem of temperature drift of oscillation frequency

a new temperature compensation scheme is proposed in this study. This scheme introduces a high-order compensation mechanism of subthreshold current self-compensation on the basis of the traditional first-order temperature compensation

which greatly reduces the influence of temperature changes on the output frequency. Additionally

the temperature coefficient of the switch resistor array is reasonably set to ensure that the frequency-temperature characteristics of the oscillator frees from the negligible effect by the calibration of the output frequency. Parasitic parameters are also extracted for the oscillator layout and simulated. The simulation results demonstrate that with the frequency calibration and temperature compensation schemes in place

the frequency error is lower than 0.04% under typical circumstances. The frequency errors are less than ±0.12% and ±0.13% within the temperature range of -40 ℃ to 125 ℃

and supply voltage range of 2.5 V to 5.5 V

respectively. The overall circuit operates with a current of 47.6 μA

and the duration of a single calibration process is shorter than 2.7 ms. The oscillator can be used in applications such as IoT and microprocessors to replace crystal oscillators

thereby decreasing the system cost and volume.

关键词

Keywords

references

胡二洋. 应用于MCU的低功耗高稳定度RC振荡器设计 [D]. 南京: 东南大学, 2018.

周朝阳, 刘云涛, 王立晶, 等. 一种基于斩波拓扑的高精度RC振荡器 [J]. 微电子学, 2024, 54(1): 73-78.

ZHOU Chaoyang, LIU Yuntao, WANG Lijing, et al. A high precision RC oscillator based on chopper topology [J]. Microelectronics, 2024, 54(1): 73-78.

XU Zhentao, WANG Wei, NING Ning, et al. A supply voltage and temperature variation-tolerant relaxation oscillator for biomedical systems based on dynamic threshold and switched resistors [J]. IEEE Transactions on Very Large Scale Integration Systems, 2015, 23(4): 786-790.

JAIN S, JANG S L. Triple-band transformer-coupled LC oscillator with large output voltage swing [J]. IEEE Microwave and Wireless Components Letters, 2014, 24(7): 475-477.

GERAEDTS P F J, VAN TUIJL E, KLUMPERINK E A M, et al. A 90 μW 12 MHz relaxation oscillator with a -162 dB FOM [C]//2008 IEEE International Solid-State Circuits Conference-Digest of Technical Papers. Piscataway, NJ, USA: IEEE, 2008: 348-618.

LEE J, GEORGE A, JE M. 5.10 A 1.4 V 10.5 MHz swing-boosted differential relaxation oscillator with 162.1 dBc/Hz FOM and 9.86 psrms period jitter in 0.18 μm CMOS [C]//2016 IEEE International Solid-State Circuits Conference. Piscataway, NJ, USA: IEEE, 2016: 106-108.

TSAI Y K, LU L H. A 51.3 MHz 21.8 ppm/ ℃ CMOS relaxation oscillator with temperature compensation [J]. IEEE Transactions on Circuits and Systems: Ⅱ Express Briefs, 2017, 64(5): 490-494.

TOKUNAGA Y, SAKIYAMA S, MATSUMOTO A, et al. An on-chip CMOS relaxation oscillator with power averaging feedback using a reference proportional to supply voltage [C]//2009 IEEE International Solid-State Circuits Conference-Digest of Technical Papers. Piscataway, NJ, USA: IEEE, 2009: 404-405.

NAVID R, LEE T H, DUTTON R W. Minimum achievable phase noise of RC oscillators [J]. IEEE Journal of Solid-State Circuits, 2005, 40(3): 630-637.

王玉伟, 张鸿, 张瑞智. 一种超低功耗的低电压全金属氧化物半导体基准电压源 [J]. 西安交通大学学报, 2017, 51(8): 47-52.

WANG Yuwei, ZHANG Hong, ZHANG Ruizhi. A low-voltage all-metal oxide semiconductor voltage reference with ultra-low power [J]. Journal of Xi'an Jiaotong University, 2017, 51(8): 47-52.

陈阳, 张瑞智, 金锴, 等. 采用电荷平衡模数转换器的高精度CMOS温度传感器 [J]. 西安交通大学学报, 2018, 52(10): 124-131.

CHEN Yang, ZHANG Ruizhi, JIN Kai, et al. A CMOS temperature sensor with high-precision using a charge-balance analog-to-digital converter [J]. Journal of Xi'an Jiaotong University, 2018, 52(10): 124-131.

SUNDARESAN K, ALLEN P E, AYAZI F. Process and temperature compensation in a 7 MHz CMOS clock oscillator [J]. IEEE Journal of Solid-State Circuits, 2006, 41(2): 433-442.

XIAO Kanglin, WANG Bo, LIN Xiaoqi, et al. A balanced hybrid ring oscillator for precise temperature compensation [C]//The 61st International Midwest Symposium on Circuits and Systems. Piscataway, NJ, USA: IEEE, 2018: 336-339.

HWANG H, JEONG C H, KWON C, et al. A 6 MHz CMOS reference clock generator with temperature and supply voltage compensation [C]//The 11th International Conference on Solid-State and Integrated Circuit Technology. Piscataway, NJ, USA: IEEE, 2012: 1-3.

SATOH Y, KOBAYASHI H, MIYABA T, et al. A 2.9 mW, +/- 85 ppm accuracy reference clock generator based on RC oscillator with on-chip temperature calibration [C]//2014 Symposium on VLSI Circuits Digest of Technical Papers. Piscataway, NJ, USA: IEEE, 2014: 1-2.

LU S Y, LIAO Y T. A low-power, differential relaxation oscillator with the self-threshold-tracking and swing-boosting techniques in 0.18 μm CMOS [J]. IEEE Journal of Solid-State Circuits, 2019, 54(2): 392-402.

MIKULIC J, SCHATZBERGER G, BARIC A. post-manufacturing process and temperature calibration of a 2 MHz on-chip relaxation oscillator [J]. IEEE Trans-actions on Circuits and Systems: Ⅰ Regular Papers, 2021, 68(10): 4076-4089.

CHEN Yang, JIAO Zihao, GUAN Weijun, et al. A +0.66/-0.73 ℃ inaccuracy, 1.99 μW time-domain CMOS temperature sensor with second-order ΔΣ modulator and on-chip reference clock [J]. IEEE Transactions on Circuits and Systems: I Regular Papers, 2020, 67(11): 3815-3827.

王海金. 一种数控反馈自校准温度补偿RC振荡器 [D]. 上海: 上海交通大学, 2018.

VILAS B, OLMOS A. A temperature compensated digitally trimmable on-chip IC oscillator with low voltage inhibit capability [C]//2004 IEEE International Symposium on Circuits and Systems. Piscataway, NJ, USA: IEEE, 2004: 501-504.

LASANEN K, RAISANEN-RUOTSALAINEN E, KOSTAMOVAARA J. A 1 V, self adjusting, 5 MHz CMOS RC-oscillator [C]//2002 IEEE International Symposium on Circuits and Systems. Piscataway, NJ, USA: IEEE, 2002: 377-380.

CHOE K, BERNAL O D, NUTTMAN D, et al. A precision relaxation oscillator with a self-clocked offset-cancellation scheme for implantable biomedical SoCs [C]//2009 IEEE International Solid-State Circuits Conference-Digest of Technical Papers. Piscataway, NJ, USA: IEEE, 2009: 402-403.

LIU Zhenyang, JIN Leisheng, ZHANG Ming, et al. A 24 MHz relaxation oscillator without comparators [C]//The 6th International Conference on Electronics Technology. Piscataway, NJ, USA: IEEE, 2023: 377-381.

NGUYEN H V, KIM J, KIM S Y. Temperature and supply voltage insensitive relaxation oscillator using voltage reference [C]//TENCON: 2018 IEEE Region 10 Conference. Piscataway, NJ, USA: IEEE, 2018: 555-558.

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