A 9.6 mW/Ch 10 MHz Wide-bandwidth Electrical Impedance Tomography IC with Accurate Phase Compensation for Breast Cancer Detection

Lee, Jae-Hyuk; Gweon, Surin; Lee, Kwonjoon; Um, Soyeon; Lee, Kyoung-Rog; Kim, Kwantae; Lee, Ji Hee; Yoo, Hoi‐Jun

doi:10.1109/cicc48029.2020.9075950

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…An eight-electrode EIT system for breast cancer detection was designed by Lee et al in 2020 which is capable of image reconstruction on a mobile imaging application [49]. The design exploits a reconfigurable front-end structure which can be used in both current driver and voltage sensor modes (Fig.…”

Section: Integrated Eit Systemsmentioning

confidence: 99%

Electrical Impedance Tomography for Biomedical Applications: Circuits and Systems Review

Hanzaee

Jiang

et al. 2021

IEEE Open J. Circuits Syst.

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There has been considerable interest in electrical impedance tomography (EIT) to provide low-cost, radiation-free, real-time and wearable means for physiological status monitoring. To be competitive with other well-established imaging modalities, it is important to understand the requirements of the specific application and determine a suitable system design. This paper presents an overview of EIT circuits and systems including architectures, current drivers, analog front-end and demodulation circuits, with emphasis on integrated circuit implementations. Commonly used circuit topologies are detailed, and tradeoffs are discussed to aid in choosing an appropriate design based on the application and system priorities. The paper also describes a number of integrated EIT systems for biomedical applications, as well as discussing current challenges and possible future directions.

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Section: Integrated Eit Systemsmentioning

confidence: 99%

Electrical Impedance Tomography for Biomedical Applications: Circuits and Systems Review

Hanzaee

Jiang

et al. 2021

IEEE Open J. Circuits Syst.

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Robust electrical impedance tomography for biological application: A mini review

Li¹,

Wang²,

Fan³

et al. 2023

Heliyon

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A Power-Efficient, Wide-Frequency-Range Impedance Measurement IC Using Frequency-Shift Technique

Cheon

Kweon

Kim

et al. 2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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This paper presents an impedance-measurement integrated circuit (IC) that extends the input frequency range to 10 MHz at low power consumption. The proposed IC directly measures the magnitude and phase of the target impedance while adopting a reference resistor, which is connected in series with the target impedance, to obviate the nonideal delays that may be introduced by the voltage-controlled current source and the receiver's signal processing paths. On the receiver side of the IC, a frequency shift is performed by a chopper in front of the first-stage instrumentation amplifier (IA). The chopper downconverts the frequency of the incoming signal, which ranges to 10 MHz, to a common intermediate frequency of 10 kHz. As a result, the requirements on the IA bandwidth and the comparator delay are greatly relaxed, leading to a significant power saving. Furthermore, this technique improves the phase accuracy because the time interval corresponding to the phase at a high frequency increases at the down-converted frequency. Finally, the auto-zeroing technique is used to cancel out the comparator offset, thus reducing the magnitude and phase errors. The proposed IC designed in a 180-nm CMOS process consumes only 544 µW for a frequency range from 100 Hz to 10 MHz with the maximum magnitude and phase errors of 1.0% and 1.8 • , respectively.

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A 9.6 mW/Ch 10 MHz Wide-bandwidth Electrical Impedance Tomography IC with Accurate Phase Compensation for Breast Cancer Detection

Cited by 9 publications

References 5 publications

Electrical Impedance Tomography for Biomedical Applications: Circuits and Systems Review

Electrical Impedance Tomography for Biomedical Applications: Circuits and Systems Review

Robust electrical impedance tomography for biological application: A mini review

A Power-Efficient, Wide-Frequency-Range Impedance Measurement IC Using Frequency-Shift Technique

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