An Isolator to eliminate grounding issues for wideband power measurements

This paper describes a method of isolating high resolution digitizers which have a common ground for different channels, so the digitizers can be used simultaneously with current shunts and resistive voltage dividers in wideband power meters. The isolators have sufficient amplitude stability up to 100 kHz to be used in static meter testing. The isolators when used in a switch formation provide a method to cancel out the phase angle errors when trying to measure the difference in phase angles between channels.