Please use this identifier to cite or link to this item: https://doi.org/10.1109/JSSC.2009.2014707
Title: A 1-V 450-nW fully integrated programmable biomedical sensor interface chip
Authors: Zou, X. 
Xu, X. 
Yao, L. 
Lian, Y. 
Keywords: Biomedical electronics
Low noise amplifier
Low-power circuit design
Sensor interface
Tunable pseudo-resistor
Issue Date: Apr-2009
Citation: Zou, X., Xu, X., Yao, L., Lian, Y. (2009-04). A 1-V 450-nW fully integrated programmable biomedical sensor interface chip. IEEE Journal of Solid-State Circuits 44 (4) : 1067-1077. ScholarBank@NUS Repository. https://doi.org/10.1109/JSSC.2009.2014707
Abstract: This paper presents a fully integrated programmable biomedical sensor interface chip dedicated to the processing of various types of biomedical signals. The chip, optimized for high power efficiency, contains a lownoise amplifier, a tunable bandpass filter, a programmable gain stage, and a successive approximation register analog-to-digital converter. A novel balanced tunable pseudo-resistor is proposed to achieve low signal distortion and high dynamic range under low voltage operations. A 53 nW, 30 kHz relaxation oscillator is included on-chip for low power consumption and full integration. The design was fabricated in a 0.35 μm standard CMOS process and tested at 1 V supply. The analog front-end has measured frequency response from 4.5 mHz to 292 Hz, programmable gains from 45.6 dB to 60 dB, input referred noise of 2.5 μvrms in the amplifier bandwidth, a noise efficiency factor (NEF) of 3.26, and a low distortion of less than 0.6% with full voltage swing at the ADC input. The system consumes 445 nA in the 31 Hz narrowband mode for heart rate detection and 895 nA in the 292 Hz wideband mode for ECG recording. © 2006 IEEE.
Source Title: IEEE Journal of Solid-State Circuits
URI: http://scholarbank.nus.edu.sg/handle/10635/83315
ISSN: 00189200
DOI: 10.1109/JSSC.2009.2014707
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