SAW-Less Analog Front-End Receivers for TDD and FDD either of the two inputs is low. The divider gives a quadrature 25% duty-cycle clock with -174dBc/Hz phase noise at 20MHz offset for 6mA of current consumption (simulated from extracted layout).

📋 论文概要

该论文提出了一种无SAW滤波器的模拟前端接收器设计，适用于TDD和FDD系统。通过去除SAW滤波器和外部balun，降低了成本和插入损耗，同时提高了接收器对带外大干扰的处理能力。

💡 主要创新点

• 提出了一种无SAW的接收器架构，通过优化LNA和混频器设计，能够处理高达0dBm的带外干扰（如GSM场景）。
• 实现了差分到单端的转换功能集成在接收器中，从而省去了外部balun，进一步降低了系统成本和损耗。

🏷 关键词

📄 原文摘要

*Now at the University of Toronto, Toronto, ON, Canada 2 In cellular receivers, out-of-band blockers are generally managed by surfaceacoustic-wave (SAW) filters between the antenna and the low-noise amplifier (LNA). For Time Division Duplexing (TDD), such as GSM, the SAW can be removed if the receiver can handle very large interferers (e.g. in GSM 0dBm 20 MHz away) [1]. Generally SAW filters also perform differential to single-ended (SE) conversion (balun). Once the SAW is removed an SE transceiver eliminates the external balun, reducing cost and attenuation. For the same sensitivity, a SAW-less SE transceiver can have a noise figure (NF) 2 to 3dB higher than a classical one. An SE LNA could be susceptable to couplings from supply and substrate, which are usually rejected through symmetry. Therefore it should become symmetric as closely as possible to the input pin. A SAW-less differential transceiver [2] can also be appealing if it has an NF close to that of classical

👥 作者与机构

Ivan Fabiano1, Marco Sosio1, Antonio Liscidini1,2, Rinaldo Castello1

University of Pavia, Pavia, Italy,