Hardware-Implemented Calibration Based on Sinusoidal Fitting for Hybrid Pipeline ADC

In this paper, a fully digital calibration based on sinusoidal fitting (sine-fit) is proposed to overcome the difficulty of signal fitting in hardware implementation. The two-step frequency detection, grouping and recursive sine-fit method are proposed to address the trade-off between frequency esti...

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Bibliographic Details
Published in2024 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 1 - 5
Main Authors Xiang, Yuguo, Zhao, Yutong, Zhou, Dayan, Zhai, Danfeng, Ren, Junyan, Ye, Fan
Format Conference Proceeding
LanguageEnglish
Published IEEE 19.05.2024
Subjects
Accuracy
CMOS process
digital calibration
Fitting
frequency estimation
Hardware
hardware implementation
hybrid ADC
Pipelines
Power demand
signal fitting
Simulation
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Summary:In this paper, a fully digital calibration based on sinusoidal fitting (sine-fit) is proposed to overcome the difficulty of signal fitting in hardware implementation. The two-step frequency detection, grouping and recursive sine-fit method are proposed to address the trade-off between frequency estimation accuracy and hardware overhead. The simulation results in MATLAB and FPGA-based hardware verification are employed to demonstrate the performance and hardware overhead. A 400-MS/s 12-bit voltage-time hybrid pipeline ADC in a 28 nm CMOS process is presented to verify the proposed calibration technique, the simulation results show that the Nyquist-rate SFDR and SNDR are improved by 12.2 dB and 11.4 dB, respectively.
ISSN:2158-1525
DOI:10.1109/ISCAS58744.2024.10557864