Patent ID: 6323796
Filing Date: 2001-11-27
Classification: H03M,H04L,H04M

Abstract:
An isolation system for providing an isolated telephone line communication channel for digital data signals in a forward direction and in a reverse direction across an isolation barrier comprised of one or more isolation elements, the system comprising:a plurality of isolation elements which form the isolation barrier, at least some of the isolation elements being isolation capacitors;a powered system on a first side of the isolation barrier, the powered system coupled to the isolation barrier for driving a forward direction digital signal across the isolation barrier;an isolated system on a second side of the isolation barrier, the isolated system coupled to the isolation barrier for driving a reverse direction digital signal across the isolation barrier; andan analog to digital converter located on the second side of the isolation barrier, the analog to digital converter configured to allow offset calibration,wherein the isolated system receives at least some power transferred from across the isolation barrier for providing a power supply on the second side of the isolation barrier.