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Design of Current Mode Instrumentation Amplifier for Portable Biosignal Acquisition System
Jin Tao Li; Sio Hang Pun; Mang I Vai; Peng Un Mak; Pui In Mak; Feng Wan
2009-12
Conference NameIEEE Biomedical Circuits and Systems Conference
Source Publication2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009
Pages9-12
Conference DateNOV 26-28, 2009
Conference PlaceBeijing, PEOPLES R CHINA
CountryCHINA
PublisherIEEE
Abstract

This paper describes the design of current mode instrumentation amplifier (CMIA) for portable biosignal acquisition system. The CMIA topology is based on voltage mode operational amplifier (op amp) power supply current sensing technique. Op amp mismatch and precise current mirrors are two design challenges of this topology. A simulation analysis is conducted based on an implementation in a CMOS 0.35 μm technology. The CMIA consumes 20.22 μW under a 3 V DC power supply and has a continuous adjustable gain bandwidth product (GBW)-independent voltage gain via single resistor. The CMRR is higher than 120dB up to 1 Hz and more than 80 dB up to 100 Hz. 

DOIhttps://doi.org/10.1109/BIOCAS.2009.5372096
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Biomedical ; Engineering, Electrical & Electronic
WOS IDWOS:000289706800003
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Cited Times [WOS]:7   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
AffiliationBiomedical Engineering Laboratory, Dept. of Electrical and Electronics Engineering, Faculty of Science and Technology, University of Macau
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Jin Tao Li,Sio Hang Pun,Mang I Vai,et al. Design of Current Mode Instrumentation Amplifier for Portable Biosignal Acquisition System[C]:IEEE,2009:9-12.
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