A Sub-1 v 90 dB-SNDR Power/BW Scalable DTDSM Using Low-Voltage Cascoded Floating Inverter Amplifiers in 130 nm CMOS

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A Sub-1 v 90 dB-SNDR Power/BW Scalable DTDSM Using Low-Voltage Cascoded Floating Inverter Amplifiers in 130 nm CMOS

Journal Article (2025)

Author(s)

Xinjie Wu (Zhejiang University)

Y. Liu (TU Delft - Electronic Components, Technology and Materials)

Zhangming Zhu (Xidian University)

Xiao Peng Yu (Zhejiang University)

Nick Nianxiong Tan (Vango Technologies Inc., Hangzhou)

Zhong Tang (Vango Technologies Inc., Hangzhou)

Research Group

Electronic Components, Technology and Materials

DOI related publication

https://doi.org/10.1109/TCSI.2025.3531666

High-resolution Delta-sigma modulator (DSM) Low supply voltage Low-voltage FIA (LVFIA) Power/BW scalable

To reference this document use:

https://resolver.tudelft.nl/uuid:0b9d49f7-1f30-4717-b54a-9eef426d78d8

More Info

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Publication Year

2025

Language

English

Research Group

Electronic Components, Technology and Materials

Bibliographical Note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. @en

Issue number

5

Volume number

72

Pages (from-to)

1976-1986

Reuse Rights

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Abstract

This paper presents a sub-1V delta-sigma modulator (DSM) with power and bandwidth (BW) scalability for IoT applications. It is built around a fully dynamic and low-voltage floating inverter amplifier (LVFIA). To extend the power and BW scalability of the LVFIA, its relatively supply-independent bias current is auto-controlled by DSM's sampling frequency f_s. Dynamic techniques such as auto-zeroing and chopping are applied to achieve low noise. Fabricated in a 130nm CMOS, the proposed sub-1V DSM shows a near-consistent SNDR (90dB) and linearly scalable power and BW (2.5nW/Hz) over a ×30 scaling range of f_s. It achieves Walden FoM and Schreier FoM of 51.3fJ/conv-step and 175.7dB, respectively.

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File under embargo until 28-07-2025