An 80MHz-BW 31.9fJ/conv-step Filtering ΔΣ ADC with a Built-In DAC-Segmentation/ELD-Compensation 6b 960MS/s SAR-Quantizer in 28nm LP for 802.11ax Applications

📋 论文概要

本文提出了一种用于802.11ax接收机的滤波ΔΣ ADC，内置DAC分段和ELD补偿的6位960MS/s SAR量化器，实现了80MHz带宽和31.9fJ/conv-step的高能效。解决了宽带宽下高动态范围和低功耗的挑战。

💡 主要创新点

• 提出滤波ΔΣ ADC架构，内置DAC分段和ELD补偿的SAR量化器，简化了量化器设计并降低了功耗。
• 在80MHz带宽下实现了31.9fJ/conv-step的领先能效，满足802.11ax的-40dB EVM要求。

🏷 关键词

📄 原文摘要

rate, which speeds up the development of the next-generation wireless-LAN (WLAN) standard. To improve spectrum efficiency and serve more users in crowded areas while increasing maximum throughput, 802.11ax supports 1024QAM modulation under MCS11 with OFDMA technology over 160MHz RF signal bandwidth (BW160). Taking channel fading margin into account, 1024QAM requires a receiver (RX) EVM better than -40dB when supporting multi-user MIMO. To satisfy the stringent RX EVM requirement, the intrinsic dynamic range (DR) of the RX analog baseband over such a wide in-band bandwidth (BW) of 80MHz must exceed 65dB to guarantee that the noise contribution is low enough, with sufficient headroom for the large peakto-average-power-ratio of the OFDM-based 1024QAM signal. Moreover, the potential

👥 作者与机构

Chi-Yun Wang, Jen-Huan Tsai, Sheng-Yuan Su, Jen-Che Tsai,

Jhy-Rong Chen, Chih-Hong Lou MediaTek, Hsinchu, Taiwan The demand for modern portable smart devices is growing at an unprecedented