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

Author

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

Author_Institution

City Univ. of Hong Kong, Kowloon, China

Volume

48

Issue

6

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

1180

Lastpage

1187

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

Keywords

multiport networks; printed circuits; transformers; wideband amplifiers; 0.4 mm; 20 mHz to 1.1 MHz; 5.856 mm; 9.75 mm; PCB thickness; analog signal; coreless PCB transformers; coreless printed-circuit-board transformers; electrical patient-monitoring devices; galvanic isolations; industrial applications; low-profile wide-band three-port isolation amplifier; operating conditions; Bandwidth; Broadband amplifiers; Costs; Coupling circuits; Electrical equipment industry; Electrocardiography; Electroencephalography; Galvanizing; Patient monitoring; Transformer cores;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.969397

Filename

969397