What is transformer isolation?
Transformer isolation employs transformer coils to transmit information across an isolation barrier. Changes in current through the transformer winding on one side of the isolation barrier induce a corresponding current on the transformer winding on the other side of the isolation barrier. Transformer-based methods have been commonly used in applications involving AC signals (Ethernet, for example) that are well suited for transformer coupling. Transformer isolation has advantages in systems with high data rates, and it can also be used to provided an isolated power supply; however, transformers have typically been bulkier than alternative solutions.
