A DC-to-1GHz Tunable RF ΔΣ ADC Achieving DR = 74dB and BW = 150MHz at f0 = 450MHz Using 550mW

📋 论文概要

本文提出了一种可调谐射频ΔΣ ADC，能够将DC至1GHz的射频信号直接数字化，支持35-150MHz带宽和2-4GHz采样率。在中心频率450MHz时实现了74dB的动态范围和150MHz带宽，功耗仅550mW，朝着通用射频ADC的目标迈出了重要一步。

💡 主要创新点

• 实现了中心频率从DC到1GHz的宽范围可调谐，覆盖多种通信标准。
• 采用ΔΣ调制架构，同时支持大带宽（150MHz）和高动态范围（74dB），且功耗较低。
• 通过灵活的采样频率和满量程调节，适应不同射频环境并优化性能。

🏷 关键词

📄 原文摘要

The ultimate ADC for receiver applications would be one that converts any desired RF signal directly into digital form so that the rest of the signal chain enjoys accurate and flexible digital signal processing and CMOS scaling. Flexibility in center frequency (f0), bandwidth (BW), sampling frequency (fS), full-scale (FS), dynamic range (DR) and power consumption (P) would allow the ADC to handle multiple standards and adapt to the RF environment [1-4]. The ADC reported in this paper is a step toward this Holy Grail of ADCs, supporting f0 = 0 to 1GHz, BW = 35 to 150MHz, fS = 2 to 4GHz and FS = -18dBm to +18dBm. At f0 = 450MHz, BW = 150MHz, fS = 4GHz and FS = +6dBm, the ADC achieves instantaneous DR = 74dB and peak SNR = 69dB with P = 550mW.

👥 作者与机构

Hajime Shibata1, Richard Schreier1, Wenhua Yang2, Ali Shaikh2,3,

Donald Paterson2, Trevor Caldwell1, David Alldred1, Ping Wing Lai2 Analog Devices, Toronto, ON, Canada Analog Devices, Wilmington, MA 3 now independent consultant, Lahore, Pakistan 1