Signal transmission systems for communication across galvanic isolation

Abstract

A signal transmission system for communicating across galvanic isolation. The signal transmission system includes: a first circuit referenced to a first potential, the first circuit comprising a signal transmitting circuit; a second circuit referenced to a second potential and galvanically isolated from the first circuit, the second circuit comprising a signal receiving circuit; And a magnetic coupling across the galvanic isolation between the first circuit and the second circuit, the magnetic coupling includes a transmitter-side inductor and a receiver-side inductor. The signaling circuit may include a source coupled to output a first state representation representing a first logic state with a plurality of transitions to the transmitter-side inductor of the magnetic coupling portion, the first state representation comprising at least a first An upward transition, a first downward transition, a second upward transition, and a second downward transition.

Description

Technical field [0001] The present disclosure generally relates to communications between a receiver and a transmitter using inductive coupling across galvanic isolation, for example in the case of a power converter in which the primary side is galvanically isolated from the secondary side. Background technique [0002] Electronic equipment in many cases includes a communication system that sends information between a transmitter and a receiver, which are galvanically isolated and therefore referenced to different ground potentials. Examples include power converters, medical equipment, marine equipment, and similar equipment. [0003] One such communication system uses magnetic coupling lines to send information between the transmitter and receiver. In addition, there is also known an inductive coupling part, in which the changing current flowing through the transmitting conductor induces a changing voltage at both ends of the receiving conductor. The coupling between the conduct...

AI Technical Summary

Problems solved by technology

[0004] Although these conductors are magnetically coupled, the conductors can remain electrically isolated from each other such that a voltage difference can be applied without significant electrical conduction between the conductors

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