A signal transmission system for communicating across galvanic isolation, the signal transmission system comprising: first circuitry referenced to a first potential, the first circuitry comprising signal transmission circuitry, wherein the signal transmission circuitry comprises a repetition code transmitter to repeatedly transmit a message to the receiver side; second circuitry referenced to a second potential and galvanically isolated from the first circuitry, the second circuitry comprising signal reception circuitry, wherein the signal reception circuitry comprises a repetition code receiver; and a magnetic coupling between the first circuitry to the second circuitry across the galvanic isolation, the magnetic coupling comprising a transmitter-side inductor and a receiver-side inductor; wherein the signal transmission circuitry comprises a source coupled to output, to the transmitter-side inductor of the magnetic coupling, a first state representation (234, 235, 236, 237, 334, 335, 336, 337, 434, 436, 534, 535, 536, 537) that represents a first logic state (231, 233, 331, 332, 531, 532) with multiple transitions, the first state representation including at least a first upward transition, a first downward transition, a second upward transition, and a second downward transition, and a second state representation (234, 235, 236, 237, 334, 335, 336, 337, 434, 436, 534, 535, 536, 537) that represents a second logic state (231, 233, 331, 332, 531, 532) with multiple transitions, wherein: the repetition code transmitter is configured to repeat the first state representation and the second state representation, and wherein the source of the signal transmission circuitry is further coupled to output, to the transmitter side inductor of the magnetic coupling, following a repeated first representation or a repeated second representation, a change state command to signal a transition from the first logic state to the second logic state or a transition from the second logic state to the first logic state. first circuitry referenced to a first potential, the first circuitry comprising signal transmission circuitry, wherein the signal transmission circuitry comprises a repetition code transmitter to repeatedly transmit a message to the receiver side; second circuitry referenced to a second potential and galvanically isolated from the first circuitry, the second circuitry comprising signal reception circuitry, wherein the signal reception circuitry comprises a repetition code receiver; and a magnetic coupling between the first circuitry to the second circuitry across the galvanic isolation, the magnetic coupling comprising a transmitter-side inductor and a receiver-side inductor; wherein the signal transmission circuitry comprises a source coupled to output, to the transmitter-side inductor of the magnetic coupling, a first state representation (234, 235, 236, 237, 334, 335, 336, 337, 434, 436, 534, 535, 536, 537) that represents a first logic state (231, 233, 331, 332, 531, 532) with multiple transitions, the first state representation including at least a first upward transition, a first downward transition, a second upward transition, and a second downward transition, and a second state representation (234, 235, 236, 237, 334, 335, 336, 337, 434, 436, 534, 535, 536, 537) that represents a second logic state (231, 233, 331, 332, 531, 532) with multiple transitions, a first state representation (234, 235, 236, 237, 334, 335, 336, 337, 434, 436, 534, 535, 536, 537) that represents a first logic state (231, 233, 331, 332, 531, 532) with multiple transitions, the first state representation including at least a first upward transition, a first downward transition, a second upward transition, and a second downward transition, and a second state representation (234, 235, 236, 237, 334, 335, 336, 337, 434, 436, 534, 535, 536, 537) that represents a second logic state (231, 233, 331, 332, 531, 532) with multiple transitions, the repetition code transmitter is configured to repeat the first state representation and the second state representation, and wherein the source of the signal transmission circuitry is further coupled to output, to the transmitter side inductor of the magnetic coupling, following a repeated first representation or a repeated second representation, a change state command to signal a transition from the first logic state to the second logic state or a transition from the second logic state to the first logic state.