一个低噪音,低功率和宽带调节的Cascode传 impedance放大器,在40nm CMOS中具有Cascode反
Xiangyi Zhang1,2, Yuansheng Zhao3, Guoyi Yu2
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Sensors (Basel, Switzerland)
|January 28, 2026
概括
这项研究引入了一种用于光学应用的新型传 impedance 放大器 (TIA). 新的设计提高了带宽和降低噪声,为先进的CMOS技术提供了显著的性能和功率效率的改进.
科学领域:
- 电气工程 电气工程
- 光子学和光电学和光电子学.
- 集成电路设计 集成电路设计
背景情况:
- 像Lidar和ISAC这样的新兴光学应用需要高带宽,低噪音,低功率的传 impedance 放大器 (TIA).
- 现有的TIA设计,包括传统的受监管cascode (RGC) 结构,由于复杂的反路径,面临带宽,噪声和功耗的限制.
研究的目的:
- 提出一种新的TIA设计,克服当前RGC结构的局限性.
- 在先进的CMOS技术节点中实现高带宽,低噪声和更高的功率效率.
主要方法:
- 提出了一种具有cascode反的新型RGC结构,以增强反收益,扩展带宽和减少噪音.
- 为了更好的功率效率,采用了利用低功耗高级CMOS工艺中的弱逆转操作的设计策略.
- 为了达到目标性能指标,进行了频率响应和噪声分析.
主要成果:
- 拟议的TIA,设计在40纳米CMOS中,实现了9.2GHz的-3dB带宽和71dBΩ的传 impedance增益,具有0.15 pF光二极管电容.
- 平均输入参考噪声电流光谱密度为18.3 pA/Hz.
- 核心电路在1.2V时消耗6.6mW,显示出显著的功率效率.
结论:
- 新的RGC TIA设计比之前的RGC TIA提供了实质性的改进,在优点数字中实现了7.4×到243×的增强.
- 拟议的TIA有效地解决了新兴光学应用中对高性能放大器的需求.
- 该设计展示了在先进的CMOS工艺中实现高带宽,低噪声和低功耗的可行性.
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