Patent ID: 6285234
Filing Date: 2001-09-04
Classification: H02M

Abstract:
A magnetic signal isolator comprising:an input node;an output node; anda current-summing isolation means, coupled between said input node and said output node, for providing electrical isolation between a signal input to said input node and a signal output from said output node, said current-summing isolation means comprising:amplifying means for comparing a scaled voltage applied to said input node and a reference voltage and outputting an error voltage representing the difference between said input voltage and said reference voltage;converting means for converting said error voltage to an error current;power transforming means, having a primary and a secondary, for providing power to said current summing circuit;current transforming means, having a primary for sampling current on the primary of said power transformer, and first and second secondaries, said second secondary receiving said current sampled from said power transformer via said primary of said current transformer; anda current-summing node receiving and summing said error current and said current sampled from said power transformer.