A low-profile wide-band three-port isolation amplifier with coreless printed-circuit-board (PCB) transformers

S. C. Tang; S. Y R Hui; Henry Shu-Hung Chung

doi:10.1109/41.969397

Author(s)

S. C. Tang
S. Y R Hui
Henry Shu-Hung Chung

Related Research Unit(s)

Detail(s)

Original language	English
Pages (from-to)	1180-1187
Journal / Publication	IEEE Transactions on Industrial Electronics
Volume	48
Issue number	6
Publication status	Published - Dec 2001

Link(s)

DOI	DOI https://doi.org/10.1109/41.969397 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-0035606012&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(9dbd03d2-e6fb-488b-bcc3-75013abb3c97).html

Abstract

Galvanic isolations are essential in many electrical patient-monitoring devices and industrial applications. In this paper, a low-profile wideband three-port isolation amplifier using coreless printed-circuit-board (PCB) transformers for isolation is studied. The PCB thickness used in the isolation amplifier is 0.4 mm. The diameters of the two coreless PCB transformers are 9.75 and 5.856 mm, respectively. Operating conditions of the transformers and a design guideline of the isolation amplifier are detailed in this paper. Experimental results show that the isolation amplifier under investigation can transmit an analog signal from 20 mHz to 1.1 MHz with good linearity. Comparison of the prototype with an industrial isolation amplifier is also included.