A digitally self-calibration method with recursive DFT algorithm for 12-bit SAR ADC realization

Yi Hsiang Juan, Hong Yi Huang, Shuenn Yuh Lee, Shin Chi Lai, Wen Ho Juang, Ching Hsing Luo

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

This paper presents a digitally self-calibration method with a recursive discrete Fourier transform (RDFT) algorithm for successive approximation (SAR) analog-to-digital converters (ADCs). A behavior model of 12-bit SAR ADC based on Matlab Simulink is proposed to combine with the compensation algorithm and digital input testing signal. In addition, the SAR ADC error caused by 1% capacitor mismatch of the DAC array is also built for evaluation of the real radixes of the DAC capacitor array. The proposed digital calibration method utilizes a RDFT to detect the third harmonic distortion value and to evaluate the error factor by using the calibration formula. Then, the error factor is applied to generate a new digital output code for the targeted SAR ADC. Under the sampling rate of 126.26 S/s, the simulation results reveals the third harmonic distortion is -47.98 dB before calibration and -84.34 dB after calibration with 1% capacitor mismatch. In addition, the SNDR and ENOB can be enhanced to 20.9 dB and 3.52 bit, respectively. Therefore, the proposed method can be adopted to enhance the performance of the ADC for various applications in the future.

原文English
主出版物標題2016 International Conference on Applied System Innovation, IEEE ICASI 2016
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781467398886
DOIs
出版狀態Published - 2016 八月 10
事件2016 International Conference on Applied System Innovation, IEEE ICASI 2016 - Ginowan City Okinawa, Japan
持續時間: 2016 五月 282016 六月 1

出版系列

名字2016 International Conference on Applied System Innovation, IEEE ICASI 2016

Other

Other2016 International Conference on Applied System Innovation, IEEE ICASI 2016
國家Japan
城市Ginowan City Okinawa
期間16-05-2816-06-01

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Computer Science Applications
  • Control and Systems Engineering
  • Social Sciences (miscellaneous)
  • Business, Management and Accounting (miscellaneous)
  • Electrical and Electronic Engineering
  • Control and Optimization

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