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0.025 mJ/image Fast-scan and SNR Enhanced Electrical Impedance Tomography IC for Lung Ventilation Monitoring
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 2017, 17(6), 78, pp.920-926
ISSN: 1598-1657 ;EISSN: 2233-4866 ;DOI: 10.5573/JSTS.2017.17.6.920
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Title:
0.025 mJ/image Fast-scan and SNR Enhanced Electrical Impedance Tomography IC for Lung Ventilation Monitoring
Author:
Lee, Jaehyuk
;
Ha, Unsoo
;
Yoo, Hoi-Jun
Subjects:
전기공학
Is Part Of:
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 2017, 17(6), 78, pp.920-926
Description:
Energy efficient lung monitoring electrical impedance tomography (EIT) IC is simulated in 180-nm CMOS process. To increase the speed of impedance sensing, fast settling high pass filter (FS-HPF) and fast settling low pass filter (FS-LPF) is proposed to reduce the settling time which takes over 90% of entire EIT data measurement latency. In FS-LPF, voltage-controlled pseudo-resistor is proposed to realize time-varying resistance. To reconstruct the accurate images, adaptive current control (ACC) scheme is implemented for SNR enhancement. Additional SNR improvements are accomplished by averaging the multiple measurements. As a result, image scanning speed of 30-fps is achieved with 0.025 mJ/Image energy efficiency. The simulation results show that ACC can reduce the image FOM error over 80% rather than conventional constant current injection method. KCI Citation Count: 0
Publisher:
대한전자공학회
Language:
English
Identifier:
ISSN: 1598-1657
EISSN: 2233-4866
DOI: 10.5573/JSTS.2017.17.6.920
Source:
Alma/SFX Local Collection
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