Integrated Circuits and Systems >

2025 , Vol. 2 >Issue 3: 131 - 138

DOI: https://doi.org/10.23919/ICS.2025.3571821

Regular Papers

A Comprehensive Digital Calibration Method for Pipeline SAR ADCs Using Extended Kalman Filter

  • DAYAN ZHOU ,
  • YUGUO XIANG ,
  • FAN YE
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  • The State Key Lab of Integrated Chips and Systems, Fudan University, Shanghai 200437, China
FAN YE (e-mail: ).

FAN YE (Member, IEEE)

Received date: 2025-01-30

  Revised date: 2025-04-20

  Accepted date: 2025-05-14

  Online published: 2025-10-22

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Abstract

This paper presents a fully digital foreground calibration method for pipeline-SAR analog-todigital converters (ADCs) using sine-fit based on the Extended Kalman Filter (EKF). The sine-fit technique provides a reference output, while an adaptive Least Mean Square (LMS) algorithm iteratively adjusts the reconstruction weights to correct mismatches and nonlinearities. The EKF significantly reduces hardware complexity by enabling real-time estimation without requiring extensive data storage. A modeled 12-bit pipeline-SAR ADC is used to evaluate the method’s effectiveness. Simulation results demonstrate that the proposed calibration scheme improves the spurious-free dynamic range (SFDR) and signal-to-noise-anddistortion ratio (SNDR) by 33.6 dB and 18.8 dB, respectively.

Key words： Analog-to-digital converter (ADC); digital calibration; extended Kalman filter (EKF); least mean square (LMS)

Cite this article

DAYAN ZHOU , YUGUO XIANG , FAN YE . A Comprehensive Digital Calibration Method for Pipeline SAR ADCs Using Extended Kalman Filter[J]. Integrated Circuits and Systems, 2025 , 2(3) : 131 -138 . DOI: 10.23919/ICS.2025.3571821

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