A 10b DC-to-20GHz Multiple-Return-to-Zero DAC with >48dB SFDR

📋 论文概要

该论文提出了一种10位、DC至20GHz的多重归零（MRZ）数模转换器（DAC），通过采用MRZ技术有效抑制了毫米波频段内的动态时序和数据误差，实现了大于48dB的无杂散动态范围（SFDR）。该设计解决了传统NRZ和RZ DAC在高频时动态误差恶化的问题，并避免了交织DAC的幅度和时序误差。

💡 主要创新点

• 提出多重归零（MRZ）架构，通过多次归零操作减少动态误差，提升高频SFDR。
• 实现了DC至20GHz的超宽带工作频率，覆盖多个奈奎斯特区，无需提高采样率。

📄 原文摘要

towards mm-wave frequencies has increased the demand for UWB DACs with minimal spurious emissions. At mm-wave, intra-DAC dynamic timing and data errors consume a significant portion of the clock period, degrading SFDR. Previously, NRZ and RZ DACs have been reported with output frequencies up to 27GHz [1-4]. However, their outputs are limited to the first two Nyquist zones, requiring high sample rates which exacerbate dynamic errors. Interleaved DACs allow for synthesis above the first Nyquist zone without increasing the sample rate, although inter-DAC amplitude and timing errors introduce additional spurs at the output that can limit SFDR [5,6]. Alternatively, mixing DACs decouple the sample rate and output frequency, however, they do not deglitch the output,

👥 作者与机构

Lucas Duncan1, Brian Dupaix1, Jamin McCue1, Brandon Mathieu1,

Matthew LaRue1, Mesfin Teshome2, Myung-Jun Choe2, Waleed Khalil1 Ohio State University, Columbus, OH Teledyne Scientific and Imaging, Thousand Oaks, CA 1 2 The push