@inproceedings{c83ae277f062462686aeecb9bd6a500d,
title = "A zero-crossing-based integrator with bidirectional two-phase charging and selective-reset operations for ∆Σ ADCs",
abstract = "Zero-crossing-based integrators (ZCBIs) are energy-efficient alternatives to conventional switched-capacitor integrators that are typically implemented using operational transconductance amplifiers (OTAs). However, ZCBIs suffer from signal-dependent overshoot errors and increased dynamic power consumption due to inherent reset operation. This paper presents a ZCBI that employs a bidirectional two-phase charging scheme and performs the reset operation selectively. A 3rd-order Delta-Sigma modulator has been fabricated in a 28-nm CMOS technology using the proposed integrators. The prototype modulator achieves 67-dB SNR and 63-dB SNDR over the bandwidth of 196 kHz with an oversampling ratio of 64. It consumes 184 µW, which translates to the figure-of-merits of 154 dB (FoMs) and 390 fJ/conv-step (FoMw).",
keywords = "Discrete-time delta-sigma ADC, Switched-capacitor, Zero-crossing-based integrator",
author = "Min, {Dong Jick} and Shim, {Jae Hoon}",
note = "Publisher Copyright: {\textcopyright} 2021 IEEE; 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 ; Conference date: 22-05-2021 Through 28-05-2021",
year = "2021",
doi = "10.1109/ISCAS51556.2021.9401569",
language = "English",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings",
address = "United States",
}