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JSSC 2020第12期RF & Wireless28nm

A Multiband FDD SAW-Less Transmitter for 5G-NR Featuring a BW-Extended N-Path Fi

一款支持5G-NR的多频段FDD SAW-less发射器，采用带宽扩展N路径滤波调制器提升性能。
28nm CMOS, 1.4-2.7GHz, 20MHz带宽, ≤−157.5dBc/Hz带外噪声, 3dBm输出功率, 2.8%-3.6%效率, ACLR1<44dBc, EVM<2%, 0.31mm²面积
5G-NR多频段FDDSAW-less发射器N路径滤波带通特性
▸带宽扩展N路径滤波调制器（BW-Ext FIL-MOD）实现高Q值带通滤波
▸正负反馈网络合并合成复极点对增强带通特性
▸基于跨阻放大器（TIA）的功率放大器驱动（PAD）提升线性度和能效
Abstract
This article reports a multiband frequency-division duplex (FDD) SA W-less transmitter (TX) for 5G new radio (5G- NR). It features a bandwidth-extended N-path filter-modulator (BW-Ext FIL-MOD) to enable high- Q bandpass filtering at a flexible RF and the synthesis of a complex-pole pair via merging positive- and negative-feedback networks (PFN/NFN) enhances its bandpass characteristic, surmounting the tradeoff between the passband flatness and out-of-band (OB) rejection, a switched- baseband (BB) in