IEEE Transactions on Circuits and Systems Part I: IRegular Papers, ( ISI ), Volume (64), No (7), Year (2017-7) , Pages (1696-1705)

Title : ( A Charge-Redistribution Phase-Domain ADC Using an IQ-Assisted Binary-Search Algorithm )

Authors: Leila Rajabi , Mehdi Saberi , Yao Liu , Reza Lotfi , Wouter A. Serdijn ,

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Phase-domain Analog-to-Digital Converters (Ph-ADCs) have been considered for power-efficient implementation of body-area network transceivers employing phase demodulation. Conventional implementations of the Ph-ADCs, which work based on a full-flash zero-crossing algorithm, use linear resistive/current combiners to determine the thermometer digital code of the signal phase. These architectures suffer from high-accuracy requirements, high-circuit complexity, and high-power consumption. Therefore, in this paper, a new IQ-assisted binary-search algorithm is proposed for implementing the Ph-ADC. The proposed Ph-ADC architecture avoids employing the power-hungry linear combiner. Moreover, for an N-bit Ph-ADC, the proposed algorithm requires only N+1 comparisons, whereas the conventional full-flash counterpart demands 2N−1 comparisons. Based on the proposed architecture, two different 5-bit charge-redistribution Ph-ADCs are designed and one of them is fabricated in a standard 0.18-μm CMOS technology. The prototype achieves an ENOB of 4.85 bits at 1 MS/s, while dissipating 12.9 μW from a 1.2-V supply.

Keywords

, Phase-domain analog-to-digital converter, IQ-assisted binary search, charge-redistribution
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@article{paperid:1064253,
author = {Rajabi, Leila and Saberi, Mehdi and Yao Liu and Lotfi, Reza and Wouter A. Serdijn},
title = {A Charge-Redistribution Phase-Domain ADC Using an IQ-Assisted Binary-Search Algorithm},
journal = {IEEE Transactions on Circuits and Systems Part I: IRegular Papers},
year = {2017},
volume = {64},
number = {7},
month = {July},
issn = {1549-8328},
pages = {1696--1705},
numpages = {9},
keywords = {Phase-domain analog-to-digital converter; IQ-assisted binary search; charge-redistribution Ph-ADC},
}

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%0 Journal Article
%T A Charge-Redistribution Phase-Domain ADC Using an IQ-Assisted Binary-Search Algorithm
%A Rajabi, Leila
%A Saberi, Mehdi
%A Yao Liu
%A Lotfi, Reza
%A Wouter A. Serdijn
%J IEEE Transactions on Circuits and Systems Part I: IRegular Papers
%@ 1549-8328
%D 2017

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