IEEE Transactions on Circuits and Systems Part II: Express Briefs, ( ISI ), Volume (53), No (9), Year (2006-9) , Pages (966-970)

Title : ( Digital Background Calibration of Capacitor Mismatch Errors in Pipelined ADCs )

Authors: Mohammad Taherzadeh-Sani , Anas A. Hamoui ,

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Abstract

A digital background calibration technique is proposed to correct for the linearity error due to capacitor mismatches in pipelined analog-to-digital converters (ADCs). During the normal ADC operation, it randomly swaps the feedback capacitor with the sampling capacitor(s) in the multiplying digital-to-analog converter (MDAC) of each pipeline stage in the pipelined ADC. The capacitor-mismatch errors in all pipeline stages are then concurrently measured and corrected in the digital domain. The proposed technique can be utilized in both single-bit and multibit MDACs. Owing to its simple iterative algorithm for capacitor-mismatch error calibration, its implementation requires minimal additional digital hardware. Behavioral simulation results show that, using the proposed calibration technique, the signal-to-noise-plus-distortion ratio is improved from 10 to 12.5bits and the spurious-free dynamic range is increased from 65 to 95 dB, in a 13-bit pipelined ADC with sigma=0.25% capacitor mismatches

Keywords

, Analog-to-digital conversion , capacitor mismatch , digital background calibration , pipelined analog-to-digital converter (ADC)
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@article{paperid:1032872,
author = {Taherzadeh-Sani, Mohammad and Anas A. Hamoui},
title = {Digital Background Calibration of Capacitor Mismatch Errors in Pipelined ADCs},
journal = {IEEE Transactions on Circuits and Systems Part II: Express Briefs},
year = {2006},
volume = {53},
number = {9},
month = {September},
issn = {1549-7747},
pages = {966--970},
numpages = {4},
keywords = {Analog-to-digital conversion ; capacitor mismatch ; digital background calibration ; pipelined analog-to-digital converter (ADC)},
}

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%0 Journal Article
%T Digital Background Calibration of Capacitor Mismatch Errors in Pipelined ADCs
%A Taherzadeh-Sani, Mohammad
%A Anas A. Hamoui
%J IEEE Transactions on Circuits and Systems Part II: Express Briefs
%@ 1549-7747
%D 2006

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