Patent ID: 7203224
Filing Date: 2007-04-10
Classification: H04L,H04M

Abstract:
1. A method for providing an isolated bidirectional communication channel for data signals in a forward direction and in a reverse direction across an isolation barrier comprised of a plurality of isolation elements, the method comprising: providing a powered system for a first side of the isolation barrier, the powered system connectable to the isolation barrier for driving a forward direction digital differential signal across at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor; providing an isolated system for a second side of the isolation barrier, the isolated system connectable to the isolation barrier for driving a reverse direction digital differential signal across the first isolation capacitor and the second isolation capacitor; configuring the powered system and the isolated system to drive the forward direction digital signal and the reverse direction digital signal both through the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the forward direction and reverse direction digital differential signals; configuring the powered system to provide a clock signal to the isolated system through at least one of the plurality of isolation elements; configuring the powered system and the isolated system so that power is capable of being provided from the powered system to the isolated system; and providing at least some power to the isolated system from across the isolation barrier.