A 4-μW Bandwidth/Power Scalable Delta-Sigma Modulator Based on Swing-Enhanced Floating Inverter Amplifiers

Journal article (2022)

Authors

Menglian Zhao Zhejiang University
Yibo Zhao Zhejiang University
H. Zhang Electronic Instrumentation - EEMCS
Yaopeng Hu Zhejiang University
Yuanxin Bao Peking University
Le Ye Peking University
Wanyuan Qu Zhejiang University
Zhichao Tan Zhejiang University
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Copyright: © 2022 Menglian Zhao, Yibo Zhao, H. Zhang, Yaopeng Hu, Yuanxin Bao, Le Ye, Wanyuan Qu, Zhichao Tan
DOI: https://doi.org/10.1109/JSSC.2021.3123261
High resolution Ultra-low power Bandwidth (BW) scalable
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Published Date

2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

This article presents a fully dynamic scalable switched-capacitor delta-sigma modulator that achieves a 94.1-dB dynamic range (DR). Power-and- bandwidth scalability by only changing the clock frequency is achieved using a capacitively biased and swing-enhanced floating inverter operational transconductance amplifier (OTA). Fabricated in a 180-nm CMOS process, the prototype achieves an signal-to-noise-and-distortion ratio (SNDR) of >87 dB across 4× scaling from 100 to 400 kHz of the sampling frequency f_ S. At 200-kHz f_ S , it achieves an SNDR/DR of 89.3/94.1 dB while consuming 4 μ W , leading to a DR-based Schreier figure of merit (FoM) of 177.1 dB.