Noise Optimization Techniques for Switched-Capacitor Based Neural Interfaces
Noise Optimization Techniques for Switched-Capacitor Based Neural Interfaces
复制标题
基于开关电容器的神经接口的噪声优化技术
DOI:
10.1109/tbcas.2020.3016738
复制
发表时间:
2020
影响因子:
5.1
通讯作者:
Yang, Zhi
中科院分区:
文献类型:
--
作者:
Xu, Jian;Nguyen, Anh Tuan;Luu, Diu Khue;Drealan, Markus;Yang, Zhi
This paper presents the noise optimization of a novel switched-capacitor (SC) based neural interface architecture, and its circuit demonstration in a 0.13 μm CMOS process. To reduce thermal noise folding ratio, and suppress kT/C noise, several noise optimization techniques are developed in the proposed architecture. First, one parasitic capacitance suppression scheme is developed to block noise charge transfer from parasitic capacitors to amplifier output. Second, one recording path-splitting scheme is proposed in the input sampling stage to selectively record local field potentials (LFPs), extracellular spikes, or both for reducing input noise floor, and total power consumption. Third, an auto-zero noise cancellation scheme is developed to suppress kT/C noise in the neural amplifier stage. A prototype neural interface chip was fabricated, and also verified in both bench-top, and In-Vivo experiments. Bench-top testings show the input-referred noise of the designed chip is 4.8 μV from 1 Hz to 300 Hz, and 2.3 μV from 300 Hz to 8 kHz respectively, and In-Vivo experiments show the peak-to-peak amplitude of the total noise floor including neural activity, electrode interface noise, and the designed chip is only around 20 μV. In comparison with conventional architectures through both circuit measurement and animal experiments, it is well demonstrated that the proposed noise optimization techniques can effectively reduce circuit noise floor, thus extending the application range of switched-capacitor circuits.
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DOI:
--
发表时间:
2012
期刊:
IEEE International Conference on Solid-State and Integrated Circuit Technology
影响因子:
--
作者:
Hong Zhang;Xue Li;Yongliang Chen;Jun Cheng
通讯作者:
Jun Cheng
DOI:
10.1109/tbcas.2012.2228857
发表时间:
2013-08-01
影响因子:
5.1
作者:
Qian, Chengliang;Shi, Jess;Sanchez-Sinencio, Edgar
通讯作者:
Sanchez-Sinencio, Edgar
DOI:
--
发表时间:
2015
期刊:
Italian National Conference on Sensors
影响因子:
--
作者:
Jian Xu;Menglian Zhao;Xiaobo Wu;Md Kafiul Islam;Zhi Yang
通讯作者:
Zhi Yang
影响因子:
5.4
作者:
Y. Fujimoto;Hitoshi Tani;Masahiko Maruyama;H. Akada;H. Ogawa;M. Miyamoto
通讯作者:
Y. Fujimoto;Hitoshi Tani;Masahiko Maruyama;H. Akada;H. Ogawa;M. Miyamoto
DOI:
10.1109/cicc.2013.6658532
发表时间:
2013
期刊:
Proceedings of the IEEE 2013 Custom Integrated Circuits Conference
影响因子:
--
作者:
Jian Xu;Zhi Yang
通讯作者:
Zhi Yang