A 90nm CMOS Bio-Potential Signal Readout Front-End with Improved Powerline Interference Rejection | |
Chon-Teng Ma2; Pui-In Mak2![]() ![]() ![]() ![]() ![]() ![]() | |
2009-10-26 | |
Conference Name | IEEE International Symposium on Circuits and Systems (ISCAS 2009) |
Source Publication | Proceedings - IEEE International Symposium on Circuits and Systems |
Pages | 665-668 |
Conference Date | MAY 24-27, 2009 |
Conference Place | Taipei, TAIWAN |
Abstract | This paper describes a 90nm CMOS low-noise low-power biopotential signal readout front-end (RFE). The front-stage instrumentation amplifier (IA) features a chopper; an AC-coupler and a novel chopper notch filter for minimizing the dc-offset; transistors' flicker noise and 50Hz powerline interference concurrently. A noise-aware transistor selection (thin- and thick-oxide) in the IA enables a flexible tradeoff between noise and input impedance performances. The 2 stage is a spike filter clocked by a parallel use of two non-overlapping clock generators, effectively tracking and suppressing the chopper spikes. The last stage is a gain-bandwidth-controllable amplifier for boosting the gain and alleviating different bio-potential signal measurements through simple digital controls. Simulation results showed that the RFE is capable of tolerating a differential electrode offset up to ±50mV, while achieving 140dB CMRR and 51.4nV/√Hz input-referred noise density. The notch at 50Hz achieves 41dB rejection. The entire RFE consumes 16.55 to 35.5μA at 3V. |
DOI | https://doi.org/10.1109/ISCAS.2009.5117836 |
URL | View the original |
Indexed By | SCI |
Language | 英语 |
WOS Research Area | Computer Science ; Engineering |
WOS Subject | Computer Science, Information Systems ; Engineering, Electrical & Electronic |
WOS ID | WOS:000275929800167 |
Fulltext Access | |
Citation statistics | |
Document Type | Conference paper |
Collection | DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING INSTITUTE OF MICROELECTRONICS |
Affiliation | 1.Instituto Superior Técnico (IST)/ TU of Lisbon, Portugal 2.Department of Electrical and Electronics Engineering, FST, University of Macau, Macao, China |
First Author Affilication | University of Macau |
Recommended Citation GB/T 7714 | Chon-Teng Ma,Pui-In Mak,Mang-I Vai,et al. A 90nm CMOS Bio-Potential Signal Readout Front-End with Improved Powerline Interference Rejection[C],2009:665-668. |
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