A High Output Impedance CMOS Current Driver for Bioimpedance Measurements

被引：10

作者：

Hong, Hongwei ^{[1
]}

Demosthenous, Andreas ^{[1
]}

Triantis, Iasonas F. ^{[1
]}

Langlois, Peter ^{[1
]}

Bayford, Richard ^{[2
]}

机构：

[1] UCL, Dept Elect & Elect Engn, Torrington Pl, London WC1E 7JE, England

[2] Middlesex Univ, London EN3 4SA, Middx, England

来源：

2010 BIOMEDICAL CIRCUITS AND SYSTEMS CONFERENCE (BIOCAS) | 2010年

基金：

英国工程与自然科学研究理事会;

关键词：

TOMOGRAPHY; EIT;

D O I：

10.1109/BIOCAS.2010.5709613

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Advances in bioimpedance measurement applications need current drivers with high output impedance in the frequencies ranging from DC to a number of MHz. In particular, it needs greater than 10 MO output impedance at low frequencies, e.g., 10 kHz. This paper presents an current driver based on operational transconductance amplifiers (OTAs) using a feedback loop to provide over 10 MO output impedance ranging from DC to 10 kHz and 1 MO at 1 MHz. In addition, a stable performance over a wide frequency range (<4 MHz) is simulated. The circuit has been designed in a 0.6-mu m CMOS process using +/- 2.5 V power supplies. Simulated results are presented.

引用

页码：230 / 233

页数：4

共 12 条

[1] APPLIED POTENTIAL TOMOGRAPHY [J].

BARBER, DC ;

BROWN, BH .

JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1984, 17 (09) :723-733

[2] Bioimpedance tomography (Electrical impedance tomography) [J].

Bayford, R. H. .

ANNUAL REVIEW OF BIOMEDICAL ENGINEERING, 2006, 8 :63-91

[3]

Franco S., 2002, Design with Operational Amplifiers and Analog Integrated Circuits, V3rd

[4]

Grimnes O. G., 2000, BIOIMPEDANCE BIOELEC

[5] On-electrode autonomous current generator for multi-frequency EIT [J].

Jivet, I. ;

Dragoi, B. .

PHYSIOLOGICAL MEASUREMENT, 2008, 29 (06) :S193-S201

[6] A 4-MHZ CMOS CONTINUOUS-TIME FILTER WITH ON-CHIP AUTOMATIC TUNING [J].

KRUMMENACHER, F ;

JOEHL, N .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 1988, 23 (03) :750-758

[7]

Macias R., 2010, Journal of Physics: Conference Series, V224, DOI 10.1088/1742-6596/224/1/012008

[8] Low-noise current excitation sub-system for medical EIT [J].

Rafiei-Naeini, M. ;

McCann, H. .

PHYSIOLOGICAL MEASUREMENT, 2008, 29 (06) :S173-S184

[9] A comparison study of electrodes for neonate electrical impedance tomography [J].

Rahal, Mohamad ;

Khor, Joo Moy ;

Demosthenous, Andreas ;

Tizzard, Andrew ;

Bayford, Richard .

PHYSIOLOGICAL MEASUREMENT, 2009, 30 (06) :S73-S84

[10] Current source design for electrical impedance tomography [J].

Ross, AS ;

Saulnier, GJ ;

Newell, JC ;

Isaacson, D .

PHYSIOLOGICAL MEASUREMENT, 2003, 24 (02) :509-516

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