Galvanic Isolation Communication Link

Master thesis (2019)

Authors

T. John Electrical Engineering, Mathematics and Computer Science

Contributors

Q. Fan Electronic Instrumentation - EEMCS (supervisor 1)
K.A.A. Makinwa Microelectronics (supervisor 1)
Faculty
Electrical Engineering, Mathematics and Computer Science
Copyright: © 2019 Thomas John
More Info
expand_more

Published Date

30-09-2019

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

Digital isolators are devices that connect one electrical system block to another over a galvanically isolating barrier. They allow electrical systems to communicate with each other even though they may operate at vastly different potentials. They also do the job of eliminating potentially damaging ground loops between the two systems. This thesis presents a digital isolator based on inductive coupling. It presents a better alternative to the traditional approach of using optocouplers. The design employs a transmitter and a receiver which communicates digital signals over an isolation barrier with emphasis on low power and high common-mode rejection. The design achieves a common-mode transient immunity of 100kV/us, a data rate of 50Mbps, power consumption of 2mA per channel and signal delay less than 15ns.