A 167μW 71.7dB-SFDR 2.4GHz BLE Receiver Using a Passive

📋 论文概要

本文提出了一种采用无源正交前端、双面双平衡级联混频器的低功耗蓝牙(BLE)接收机，在2.4GHz频段实现了167μW功耗和71.7dB无杂散动态范围(SFDR)。通过全无源设计避免了传统有源架构的偏置电流和非线性问题，显著提高了功率效率和线性度，适用于短距离物联网连接。

💡 主要创新点

• 采用无源正交前端替代传统有源gm-LNA，消除了偏置电流和非线性，大幅降低功耗并提升线性度。
• 设计了双面双平衡级联混频器结构，进一步优化了混频器的噪声和线性性能。
• 整体接收机架构为无源密集型设计，仅使用电感、电容和开关，实现低功耗与高SFDR的兼顾。

🏷 关键词

📄 原文摘要

Haijun Shao1, Rui P. Martins1,2, Pui-In Mak1 University of Macau, Macau, China University of Lisboa, Lisboa, Portugal 1 2 The Bluetooth Low-Energy (BLE) receivers evolved from their traditional active RF frontends [1,2] to recent passive RF front-ends [3,4] that aim to improve the power efficiency and blocker resilience. Without the bias current and nonlinearity of the gm-based LNA, a passive-intensive design with mainly inductor (transformer), capacitor and switch, allows substantial power saving and better linearity, while preserving a noise figure (NF) adequate for short-range IoT connectivity. Yet, the I/Q LO generation still bottlenecks the power reduction, as it primarily involves a double-frequency VCO, a divider-by-2 and LO buffers. This paper reports a 167μW 2.4GHz BLE receiver featuring a number of passive-intensive RF functions. Specifically, the co-design between a passive quadraturefront-end (QFE) and a 2.4GHz dual-transformer-coupled Class-D VCO averts the

👥 作者与机构

Quadrature-Front-End, a Double-Sided Double-Balanced, Cascaded Mixer and a Dual-Transformer-Coupled Class-D VCO