A Digital-Intensive Receiver Front-End Using VCO-Based ADC with an Embedded 2nd-Order Anti-Aliasing Sinc Filter in 90nm CMOS

📋 论文概要

这篇论文提出了一种数字密集型接收机前端，采用基于VCO的ADC并内嵌二阶抗混叠sinc滤波器，旨在移除传统模拟滤波器和可变增益放大器，实现多模多频带接收机的简易编程和低电压工作。

💡 主要创新点

• 使用基于VCO的ADC实现数字密集型接收机前端，降低对高性能模拟电路的依赖，适应低电压工艺。
• 在ADC中嵌入二阶抗混叠sinc滤波器，无需额外模拟抗混叠滤波器，简化接收机链并提高可编程性。

🏷 关键词

📄 原文摘要

KAIST, Daejeon, Korea, ETRI, Daejeon, Korea One of the recent trends in multimode multiband (MMMB) receivers is to remove the analog filter or variable-gain amplifier (VGA) in the receiver chain and employ a wide-dynamic-range ADC directly after the mixer or include the mixer in the ADC [1,2]. While such architecture provides ease of programmability once the signals are digitized, it puts a large burden on the ADC and anti-alias filter. Hence, ADCs typically use high-performance analog circuits for wide dynamic range, even though it is difficult to implement these circuits using low-voltage nanoscale CMOS processes. A promising ADC architecture for an MMMB receiver is the VCO-based ADC, since it offers 1st-order noise-shaping from its openloop digital-intensive nature, thus allowing high sampling rate and high SNR [3]. Furthermore, the VCO-based ADC provides an inherent anti-aliasing 1st-order

👥 作者与机构

Jaewook Kim1, Wonsik Yu1, Hyun-Kyu Yu2, SeongHwan Cho1, 1