A 0.69-mW Subsampling NB-IoT Receiver Employing a Linearized <italic>Q</italic>-Boosted LNA

A 0.69-mW Subsampling NB-IoT Receiver Employing a Linearized <italic>Q</italic>-Boosted LNA

This article presents a receiver for narrowband IoT (NB-IoT) that eliminates the need for an RF local oscillator (LO) via a subsampling architecture. A pseudo-balun Q-boosted LNA provides sharp anti-aliasing filtering with a noise figure (NF) of 5.6 dB. A direct-coupling derivative superposition tec...

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Bibliographic Details
Main Authors: Hongyu Lu, Ahmed Gharib Gadelkarim, Jiannan Huang, Patrick P. Mercier
Format: Article
Language:English
Published: IEEE 2024-01-01
Series:IEEE Open Journal of the Solid-State Circuits Society
Subjects:
Linearity
LNA
narrowband IoT (NB-IoT)
receiver
subsampling
Online Access:https://ieeexplore.ieee.org/document/10564201/
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Summary:This article presents a receiver for narrowband IoT (NB-IoT) that eliminates the need for an RF local oscillator (LO) via a subsampling architecture. A pseudo-balun Q-boosted LNA provides sharp anti-aliasing filtering with a noise figure (NF) of 5.6 dB. A direct-coupling derivative superposition technique where low-<inline-formula> <tex-math notation="LaTeX">$V_{t}$ </tex-math></inline-formula> and thick-gate transistors with opposite nonlinear characteristics are combined to improve the measured IIP3 by 7 dB to &#x2212;18 dBm with little NF overhead. Fabricated in 65-nm CMOS, the entire receiver, including the LNA, an S/H circuit, and a 10-bit SAR ADC, consumes only 0.69 mW while meeting NB-IoT specifications.
ISSN:2644-1349

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