Patent ID: 7154940
Filing Date: 2006-12-26
Classification: H04L,H04M

Abstract:
1. A bidirectional isolation system for providing an isolated 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 system comprising: (a) a powered system on a first side of the isolation barrier, the powered system comprising a first driver circuit connected 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; and (b) an isolated system on a second side of the isolation barrier, the isolated system comprising a second driver circuit connected to the isolation barrier for driving a reverse direction digital differential signal across the first isolation capacitor and the second isolation capacitor; wherein the forward direction digital differential signal and the reverse direction digital differential signal are both driven 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; wherein the isolated system receives power from the powered system from across the isolation barrier; and wherein the isolated system receives a clock signal from the powered system through at least one of the plurality of isolation elements.