Shanshan Dai, Rukshan T. Perera, Zi Yang, J. Rosenstein
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引用次数: 30
摘要
提出并制作了一种采用180nm CMOS工艺的超宽动态范围集成电流测量系统。它的双模设计提供并发电压和频率输出，而不需要外部时钟源。积分器核心提供电压输出√，本底噪声为11.6 fA/ (Hz)，截止频率为-3 dB，为1.4 MHz。它与异步电流-频率转换器合并，产生与输入电流成线性比例的输出频率。电压和频率输出产生155 dB的电流测量范围，从204 fA (100 Hz)或1.25 pA (10 kHz)到11.6 μA。该架构的低噪声、宽带宽和宽动态范围使其成为高度非线性电化学和电生理系统测量的理想选择。
A 155-dB Dynamic Range Current Measurement Front End for Electrochemical Biosensing
An integrated current measurement system with ultra wide dynamic range is presented and fabricated in a 180-nm CMOS technology. Its dual-mode design provides concurrent voltage and frequency outputs, without requiring an external clock source. An integrator-differentiator core provides a voltage output √ with a noise floor of 11.6 fA/ (Hz) and a -3 dB cutoff frequency of 1.4 MHz. It is merged with an asynchronous current-to-frequency converter, which generates an output frequency linearly proportional to the input current. Together, the voltage and frequency outputs yield a current measurement range of 155 dB, spanning from 204 fA (100 Hz) or 1.25 pA (10 kHz) to 11.6 μA. The proposed architecture's low noise, wide bandwidth, and wide dynamic range make it ideal for measurements of highly nonlinear electrochemical and electrophysiological systems.
期刊介绍：
The IEEE Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems Society to a wide variety of related areas such as: • Bioelectronics • Implantable and wearable electronics like cochlear and retinal prosthesis, motor control, etc. • Biotechnology sensor circuits, integrated systems, and networks • Micropower imaging technology • BioMEMS • Lab-on-chip Bio-nanotechnology • Organic Semiconductors • Biomedical Engineering • Genomics and Proteomics • Neuromorphic Engineering • Smart sensors • Low power micro- and nanoelectronics • Mixed-mode system-on-chip • Wireless technology • Gene circuits and molecular circuits • System biology • Brain science and engineering: such as neuro-informatics, neural prosthesis, cognitive engineering, brain computer interface • Healthcare: information technology for biomedical, epidemiology, and other related life science applications. General, theoretical, and application-oriented papers in the abovementioned technical areas with a Circuits and Systems perspective are encouraged to publish in TBioCAS. Of special interest are biomedical-oriented papers with a Circuits and Systems angle.
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