Abstract:
IoT sensing applications operating from batteries or harvested energy require microwatt data converters. To accurately measure small signals, they often need to achieve a...Show MoreMetadata
Abstract:
IoT sensing applications operating from batteries or harvested energy require microwatt data converters. To accurately measure small signals, they often need to achieve a high DR (>90dB) and better linearity than the transducers themselves (>14b) with a BW in the kHz range. IoT systems also often consist of multiple sensing modalities with different BW requirements and are often heavily duty-cycled to reduce power consumption. This paper presents a fully dynamic discrete-time delta-sigma modulator (DTDSM) that supports 4x bandwidth/power scaling without any programming overhead except for changing fs, using a capacitively biased swing-enhanced floating inverter amplifier (SEFIA). The prototype, fabricated in 180nm CMOS, consumes only 4μW at 800Hz BW and achieves >87dB SNDR over 2 octaves of fs, between 100 kHz and 400 kHz, and a DR of 94.1 dB while operating with an OSR of 125.
Published in: 2021 IEEE Custom Integrated Circuits Conference (CICC)
Date of Conference: 25-30 April 2021
Date Added to IEEE Xplore: 17 May 2021
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Zhejiang University, Hangzhou, China
Delft University of Technology, Delft, The Netherlands
Zhejiang University, Hangzhou, China
Peking University, Beijing, China
Peking University, Beijing, China
Zhejiang University, Hangzhou, China
Zhejiang University, Hangzhou, China
Zhejiang University, Hangzhou, China
Contents Zhejiang University, Hangzhou, China
Delft University of Technology, Delft, The Netherlands
Zhejiang University, Hangzhou, China
Peking University, Beijing, China
Peking University, Beijing, China
Zhejiang University, Hangzhou, China
Zhejiang University, Hangzhou, China
Zhejiang University, Hangzhou, China
