Patent ID: 8761269

Claim:
An isolated communication system comprising: a transmission unit including an edge pulse generating circuit and a verification circuit; a receiving unit isolated from the transmission unit; and an isolated communication unit which provides isolation between the transmission unit and the receiving unit and transmits signals between the transmission unit and the receiving unit, wherein: the edge pulse generating circuit is configured to convert a digital input signal into a pulse and to send the pulse to the isolated communication unit, the digital input signal transitioning between a first level and a second level different from the first level, the isolated communication unit is configured to transmit the pulse generated by the edge pulse generating circuit to the receiving unit, the receiving unit is configured to receive the pulse transmitted by the isolated communication unit, to convert the pulse into a digital output signal and to send back the pulse as a return pulse the isolated communication unit is configured to transmit the return pulse to the transmission unit, and the verification circuit is configured to determine whether or not the transmission unit has received the return pulse sent back from the receiving unit, and is further configured to generate an additional pulse when the verification circuit determines that the transmission unit has not received the return pulse sent back from the receiving unit.