TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system

This article presents a method to calibrate a 16-channel 40 GS/s time-interleaved analog-to-digital converter (TI-ADC) based on channel equalization and Monte Carlo method. First, the channel mismatch is estimated by the Monte Carlo method, and equalize each channel to meet the calibration requireme...

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Autores principales:	Yongjie Zhao, Sida Li, Zhiping Huang
Formato:	article
Lenguaje:	EN
Publicado:	AIMS Press 2021
Materias:	analog-to-digital conversion monte carlo estimation channel equalization field programmable gate array (fpga) Biotechnology TP248.13-248.65 Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/6f4dcf410ee04576a409ff7298e2949c
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spelling	oai:doaj.org-article:6f4dcf410ee04576a409ff7298e2949c2021-11-29T03:02:52ZTI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system10.3934/mbe.20214461551-0018https://doaj.org/article/6f4dcf410ee04576a409ff7298e2949c2021-10-01T00:00:00Zhttps://www.aimspress.com/article/doi/10.3934/mbe.2021446?viewType=HTMLhttps://doaj.org/toc/1551-0018This article presents a method to calibrate a 16-channel 40 GS/s time-interleaved analog-to-digital converter (TI-ADC) based on channel equalization and Monte Carlo method. First, the channel mismatch is estimated by the Monte Carlo method, and equalize each channel to meet the calibration requirement. This method does not require additional hardware circuits, every channel can be compensated. The calibration structure is simple and the convergence speed is fast, besides, the ADC is worked in background mode, which does not affect the conversion. The prototype, implemented in 28 nm CMOS, reaches a 41 dB SFDR with an input signal of 1.2 GHz and 5 dBm after the proposed background offset and gain mismatch calibration. Compared with previous works, the spurious-free dynamic range (SFDR) and the effective number of bits (ENOB) are better, the estimation accuracy is higher, the error is smaller and the faster speed of convergence improves the efficiency of signal processing.Yongjie ZhaoSida LiZhiping HuangAIMS Pressarticleanalog-to-digital conversionmonte carlo estimationchannel equalizationfield programmable gate array (fpga)BiotechnologyTP248.13-248.65MathematicsQA1-939ENMathematical Biosciences and Engineering, Vol 18, Iss 6, Pp 9050-9075 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	analog-to-digital conversion monte carlo estimation channel equalization field programmable gate array (fpga) Biotechnology TP248.13-248.65 Mathematics QA1-939
spellingShingle	analog-to-digital conversion monte carlo estimation channel equalization field programmable gate array (fpga) Biotechnology TP248.13-248.65 Mathematics QA1-939 Yongjie Zhao Sida Li Zhiping Huang TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
description	This article presents a method to calibrate a 16-channel 40 GS/s time-interleaved analog-to-digital converter (TI-ADC) based on channel equalization and Monte Carlo method. First, the channel mismatch is estimated by the Monte Carlo method, and equalize each channel to meet the calibration requirement. This method does not require additional hardware circuits, every channel can be compensated. The calibration structure is simple and the convergence speed is fast, besides, the ADC is worked in background mode, which does not affect the conversion. The prototype, implemented in 28 nm CMOS, reaches a 41 dB SFDR with an input signal of 1.2 GHz and 5 dBm after the proposed background offset and gain mismatch calibration. Compared with previous works, the spurious-free dynamic range (SFDR) and the effective number of bits (ENOB) are better, the estimation accuracy is higher, the error is smaller and the faster speed of convergence improves the efficiency of signal processing.
format	article
author	Yongjie Zhao Sida Li Zhiping Huang
author_facet	Yongjie Zhao Sida Li Zhiping Huang
author_sort	Yongjie Zhao
title	TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
title_short	TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
title_full	TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
title_fullStr	TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
title_full_unstemmed	TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
title_sort	ti-adc multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system
publisher	AIMS Press
publishDate	2021
url	https://doaj.org/article/6f4dcf410ee04576a409ff7298e2949c
work_keys_str_mv	AT yongjiezhao tiadcmultichannelmismatchestimationandcalibrationinultrahighspeedopticalsignalacquisitionsystem AT sidali tiadcmultichannelmismatchestimationandcalibrationinultrahighspeedopticalsignalacquisitionsystem AT zhipinghuang tiadcmultichannelmismatchestimationandcalibrationinultrahighspeedopticalsignalacquisitionsystem
_version_	1718407650760196096

TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system

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