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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

8 Scopus Citations
View graph of relations



Original languageEnglish
Pages (from-to)1180-1187
Journal / PublicationIEEE Transactions on Industrial Electronics
Issue number6
Publication statusPublished - Dec 2001


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.

Research Area(s)

  • Coreless printed-circuit-board transformers, Isolation amplifier, Wideband