Title :
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
fDate :
12/1/2001 12:00:00 AM
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;
Journal_Title :
Industrial Electronics, IEEE Transactions on
