A multi-frequency bioimpedance measurement ASIC for electrical impedance tomography
- 1 September 2011
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 19308833,p. 331-334
Abstract
This paper presents an integrated circuit for the measurement of tissue impedances. The circuit will be part of a wearable electrical impedance tomography based imaging system intended to be used for neonate lung function monitoring in intensive care units. The ASIC is designed to measure the real and imaginary parts of tissue impedances at two different frequencies simultaneously. It includes both circuitry for current injection and impedance measurement. The readout part employs synchronous chopping detection. The ASIC was fabricated in a 0.6-μm CMOS technology, occupies a core area of 4.5 mm 2 and dissipates about 10 mW from ±2.5 V power supplies. It has wideband frequency operation, from DC to about 1 MHz, and a measurement accuracy of less than 1 Ω.Keywords
This publication has 10 references indexed in Scilit:
- A high output impedance CMOS current driver for bioimpedance measurements2010
- A 3.9 mW 25-Electrode Reconfigured Sensor for Wearable Cardiac Monitoring SystemIEEE Journal of Solid-State Circuits, 2010
- FPGA-based multi-frequency excitation and modulation technology in EIT system2010
- Robust Linearized Image Reconstruction for Multifrequency EIT of the BreastIEEE Transactions on Medical Imaging, 2008
- Multi-frequency EIT system with radially symmetric architecture: KHU Mark1Physiological Measurement, 2007
- BIOIMPEDANCE TOMOGRAPHY (ELECTRICAL IMPEDANCE TOMOGRAPHY)Annual Review of Biomedical Engineering, 2006
- A tissue impedance measurement chip for myocardial ischemia detectionIEEE Transactions on Circuits and Systems I: Regular Papers, 2005
- Mk3.5: a modular, multi-frequency successor to the Mk3a EIS/EIT systemPhysiological Measurement, 2001
- A CMOS IC for portable EEG acquisition systemsIEEE Transactions on Instrumentation and Measurement, 1998
- Low-power monolithic signal-conditioning systemIEEE Journal of Solid-State Circuits, 1990