A Fully Integrated 2×1 Dual-Band Direct-Conversion Transceiver with Dual-Mode Fractional Divider and Noise-Shaping TIA for Mobile WiMAX SoC in 65nm CMOS nent, 1/3 fC, is actually generated by the mismatch at the output, its power level is low enough to be filtered out by the subsequent circuits, as is the case for the “fractional-then-distribute” architecture with LC-BPFs. This issue is less critical in RX.

📋 论文概要

本文提出了一款完全集成的2×1双频段直接变频收发机，采用双模式分数分频器和噪声整形TIA，满足移动WiMAX (IEEE 802.16e) 标准。通过优化设计，TX输出杂散低于-60dBc，在40个样本中验证了对工艺变化的鲁棒性。

💡 主要创新点

• 提出双模式分数分频器，支持两个频段的工作模式切换
• 采用噪声整形TIA改善接收机线性度和噪声性能
• 实现了全集成双频段直接变频架构，满足移动WiMAX杂散规范

🏷 关键词

📄 原文摘要

Masaomi Iwanaga, Kenichi Sami, Rui Ito, Junji Wadatsumi, Yuki Tsuda, Shoko Oda, Shunji Kawaguchi, Nobuyuki Itoh, Mototsugu Hamada Figure 25.4.4 shows the measured spurs at the TX output. Other than 1/3 fC, 2/3, 4/3, and 5/3 fC are also observed in the spectrum due to the non-linearity. However, the design is robust to the process variation, so that the levels of the spurs are below -60dBc in 40 samples. The results satisfy the spurious specification in mWiMAX with a sufficient margin. 25.4 Toshiba, Kawasaki, Japan Mobile WiMAX complying with the IEEE 802.16e standard is one of the emerging standards and is achieving world-wide penetration. Low-cost implementation is essential and single-chip implementation is a straightforward approach. However, there are many technical challenges such as floor-planning, signal integrity and scalability of analog/RF circuits in an SoC, as well as power reduction in scaled CMOS technologies. In this work, we have designed and fabricated a fully-integrat

👥 作者与机构

Jun Deguchi, Daisuke Miyashita, Yosuke Ogasawara, Gaku Takemura,