02 / TIA LITERATURE
Interleaving Active Feedback in Inverter-Based Optical Receivers for Bandwidth Extension and Linearity Improvement
若 PDF 预览未显示,可使用上方链接打开原文。
作者与单位: 见论文原文首页(下方已附前三页原图)
会议: IEEE ISCAS 2024
DOI: https://doi.org/10.1109/iscas58744.2024.10558128
原文: paper.pdf
核心参考量
| 维度 | 信息 |
|---|---|
| 应用场景 | PAM-4 optical receiver main amplifier after TIA |
| 是否实测 | Simulation only |
| 工艺节点 | 65 |
| 前端架构 | TIA后级gm/gm主放大器;IAFB带宽扩展 |
| 关键性能条件 | 50 Gb/s PAM-4;主放带宽20 GHz级 |
| 可参考程度 | 低相关 |
设计挑战
- 应用约束:PAM-4 optical receiver main amplifier after TIA。
- 核心电路矛盾:传统TIA后的主放大器带宽常成为瓶颈。本文交错主动反馈以扩展后级主放大器带宽和线性度;它优化的是TIA后处理链,而非传感端I-V转换。
- 指标与实现约束:50 Gb/s PAM-4;主放带宽20 GHz级。这些数值必须同时结合输入电容、输出负载、供电与验证频率判断,不能只比较单个峰值指标。
架构创新点
1. 前端拓扑
TIA后级gm/gm主放大器;IAFB带宽扩展。该拓扑决定输入阻抗、反馈环路和主要噪声源,也是判断能否迁移到阵列读出的第一层依据。
2. 关键机制
IAFB提高后级主放带宽与线性度
3. 与传统方案的差异
传统TIA后的主放大器带宽常成为瓶颈。本文交错主动反馈以扩展后级主放大器带宽和线性度;它优化的是TIA后处理链,而非传感端I-V转换。
性能与证据
| 项目 | 判断 |
|---|---|
| 工艺 | 65 |
| 验证方式 | Simulation only |
| 关键性能 | 50 Gb/s PAM-4;主放带宽20 GHz级 |
| 证据等级 | 仿真或后仿,证据等级中等 |
| 参考程度 | 低相关 |
原文摘要证据:Main amplifiers are crucial components in the is not high enough, especially for PAM-4 optical links. To design of optical receivers, amplifying the output voltage of the improve linearity, [4] uses gm/gm amplifiers that consist of a transimpedance amplifier (TIA). While Cherry-Hooper (CH) transconductor followed by a diode-connected inverter load to amplifiers are widely utilized in optical receivers due to their high cancel the nonlinearities of the transconductor [5]. Although the bandwidth, they often fall short in linearity, making them less gm/gm topology is highly linear, its bandwidth is much smaller suitable for PAM-4 and higher-order modulation schemes. This than a CH amplifier. In less advanced technologies, the gm/gm study presents a highly linear PAM-4 optical receiver design. The design will require bandwidth extension techniques [6-10]. proposed main amplifier employs gm/gm inverter-based amplifiers known for their sup...
与 SOTA 对比
- 比较重点:优先比较相同输入电容、相同带宽定义和相同输出负载下的增益、噪声、线性度与功耗。
- 本文优势:IAFB提高后级主放带宽与线性度
- 主要限制:适合放在后级放大器补充,不主讲
- 口径提醒:会议论文中仿真值、后仿值和芯片实测值不可直接混排;未在正文报告的指标不作推算排名。
NS-RAM / CIM 适配判断
可在NS-RAM需要宽带后级放大/均衡时参考;若带宽由阵列RC和Cin主导,应优先处理前端。
迁移到 NS-RAM 时仍需重新确定列线电容、最小/最大读电流、允许建立时间、输出摆幅和 ADC 满量程,并据此重算反馈元件与环路稳定性。
核心优势与局限
核心优势:IAFB提高后级主放带宽与线性度
主要局限:适合放在后级放大器补充,不主讲
结论:该文适合作为“TIA后级gm/gm主放大器;IAFB带宽扩展”路线的参考,但不能脱离其原始应用和负载条件直接套用指标。
论文原图


