对于纳米孔传感器的低噪音和高速跨阻抗放大器
Shaoxi Fang1,2, Bohua Yin1,3, Wanyi Xie1,2
1Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, People's Republic of China.
The Review of scientific instruments
|July 13, 2023
概括
本研究介绍了一种用于纳米孔传感的紧型,低噪音的跨阻抗放大器. 开发的电路实现了亚-2 pA rms噪声,使得纳米孔系统的准确检测.
科学领域:
- 电子 电子 电子 电子 电子 电子 电子
- 生物技术是生物技术.
- 纳米技术 纳米技术
背景情况:
- 精确检测小电流对于纳米孔传感器性能至关重要.
- 现有的跨阻抗放大器可能缺乏先进的纳米孔系统所需的速度,低噪声或紧性.
研究的目的:
- 为纳米孔检测系统设计和实施一个紧的,低噪音的,高速的跨阻抗放大器.
- 为了增强纳米孔传感的信号噪声比和带宽.
主要方法:
- 使用了双阶段放大设计.
- 在第一阶段使用了高性能FET操作放大器 (ADA4530-1) 和1GΩ反电阻,用于低噪音的跨阻抗放大.
- 在第二阶段内嵌入了一个高通架过器,以扩展带宽.
主要成果:
- 在大约5kHz的带宽下,实现了低噪声水平低于2 pA rms的低噪声水平.
- 将最大运行带宽扩展到50kHz.
- 证明了适合纳米孔传感器集成的稳定频率响应.
结论:
- 开发的跨阻抗放大器满足了准确和高速纳米孔传感的严格要求.
- 紧和低噪音的设计有助于提高纳米孔检测系统的性能.
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