An embodiment of an optocoupler may provide electrical isolation between signals on a driver side and signals on a receiver side of the optocoupler by generating light signals via a fiber-optic link to the receiver. One embodiment includes driver circuit that may receive an input signal (or a series of input signals) having a specific clock cycle. Instead of driving a light source, such as a light-emitting diode, for the entire duration in which an input signal may be at a high logic level, the LED may be driven with only a pulse to indicate any transitions from high-to-low or from low-to-high. In another embodiment, a receiver circuit may then interpret pulses of differing widths to reconstruct a series of logical signal from only its pulse transitions. By limiting the amount of time in which the LED is on, yet still conveying all underlying data in the input signal, the optocoupler reduces the overall power needed during operation.
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