Expansion the Output Swing of the Ultra-Low Noise Transimpedance Amplifier for Microcurrent Measurement
Authors
Xueyou Shi, Kai Xie, Bin Sun, Kai Zhao, Anfeng Huang
Corresponding Author
Xueyou Shi
Available Online August 2016.
- DOI
- 10.2991/icmeit-16.2016.43How to use a DOI?
- Keywords
- microcurrent, low noise amplifier, output swing.
- Abstract
Accurate measuring of micro currents in fA range requires an ultra-low bias amplifier which has relative low output swing, limits the value of feedback resistor, and ultimately results a poor noise performances. In this paper, an improved low-noise transimpedance amplifier with a large feedback loop is proposed, so that high-value resistor can be employed to achieve low noise performance. The noise theory, operational principle and circuit implementation are discussed. The prototype is designed with measurement range of 20V/200pA, the test results indicates a low white noise level of 0.5fA/ Hz, and a offset bias of ~2.5fA, while providing an output voltage swing expand to above ±20V.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Xueyou Shi AU - Kai Xie AU - Bin Sun AU - Kai Zhao AU - Anfeng Huang PY - 2016/08 DA - 2016/08 TI - Expansion the Output Swing of the Ultra-Low Noise Transimpedance Amplifier for Microcurrent Measurement BT - Proceedings of the 2016 International Conference on Mechatronics Engineering and Information Technology PB - Atlantis Press SP - 229 EP - 232 SN - 2352-5401 UR - https://doi.org/10.2991/icmeit-16.2016.43 DO - 10.2991/icmeit-16.2016.43 ID - Shi2016/08 ER -