A Highly Linear Low-Noise Transimpedance Amplifier for Indoor Fiber-Wireless Remote Antenna Units
A Highly Linear Low-Noise Transimpedance Amplifier for Indoor Fiber-Wireless Remote Antenna Units
复制标题
用于室内光纤无线远程天线单元的高线性低噪声跨阻放大器
DOI：
10.3390/electronics8040437
复制
发表时间：
2019
期刊：
影响因子：
2.9
通讯作者：
S. Celma
中科院分区：
文献类型：
--
作者：
G. Royo;Antonio D. Martínez;C. Sánchez;C. Aldea;S. Celma
本文介绍了一种具有高线性度的低噪声跨阻放大器 (TIA) 的优化设计，适用于远程天线单元 (RAU) 的下行链路接收器。该设计的目的是用于使用混合光纤无线系统进行 WLAN 传输的经济高效的室内分布式天线系统 (DAS)。该电路拓扑由具有数字可编程互阻抗的全差分并联反馈 TIA 组成。开环增益补偿技术用于保持稳定性和恒定带宽 (BW)。 TIA 采用 65 nm CMOS 技术制造，电源电压为 1.2 V。 TIA 的总功耗为 6 mW。使用 1550 nm PIN 光电二极管进行了完整的电气和光学特性分析，以演示可靠的 54 Mb/s 802.11a WLAN 传输，在 20 dB 光输入范围内误差矢量幅度 (EVM) 低于 3%。
This article presents an optimized design of a low-noise transimpedance amplifier (TIA) with high linearity for use in the downlink receiver of a remote antenna unit (RAU). The aim of this design is to be used in a cost-effective indoor distributed antenna system (DAS) for WLAN transmission using a mixed fiber-wireless system. The circuit topology consists of a fully differential shunt–shunt feedback TIA with digitally programmable transimpedance. An open-loop gain compensation technique is used to maintain stability and constant bandwidth (BW). The TIA has been fabricated in 65 nm CMOS technology with a 1.2 V voltage supply. The total power consumption of the TIA is 6 mW. A complete electrical and optical characterization with a 1550 nm PIN photodiode has been performed to demonstrate the reliable 54 Mb/s 802.11a WLAN transmission achieved with an error vector magnitude (EVM) lower than 3% for a 20 dB optical input range.