Analog Integrated Current Drivers for Bioimpedance Applications: A Review

Nazanin Neshatvar; Peter Langlois; Richard Bayford; Andreas Demosthenous

doi:10.3390/s19040756

Analog Integrated Current Drivers for Bioimpedance Applications: A Review

Sensors (Basel). 2019 Feb 13;19(4):756. doi: 10.3390/s19040756.

Authors

Nazanin Neshatvar¹, Peter Langlois², Richard Bayford³, Andreas Demosthenous⁴

Affiliations

¹ Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK. n.neshatvar.12@ucl.ac.uk.
² Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK. p.langlois@ucl.ac.uk.
³ Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK. r.bayford@ucl.ac.uk.
⁴ Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK. a.demosthenous@ucl.ac.uk.

Abstract

An important component in bioimpedance measurements is the current driver, which can operate over a wide range of impedance and frequency. This paper provides a review of integrated circuit analog current drivers which have been developed in the last 10 years. Important features for current drivers are high output impedance, low phase delay, and low harmonic distortion. In this paper, the analog current drivers are grouped into two categories based on open loop or closed loop designs. The characteristics of each design are identified.

Keywords: bioimpedance measurement; current driver; integrated circuit; linear feedback; nonlinear feedback; transconductance.

Publication types

Review

MeSH terms

Algorithms
Dielectric Spectroscopy / methods*
Electric Impedance*
Finite Element Analysis
Humans
Tomography / methods*