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High Precision Optical Isolation for Analog Signals

Authored on: Jun 3, 2008 by Iñaki Zuloaga

Technical Paper

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This paper discusses a circuit that uses Rejustors to build an all-analog, optically isolated analog signal link for industrial and medical applications, at low cost and with high accuracy. A digital link could be used, but becomes costly for multiple signals, due to multiple converters required. This circuit allows for use of low-cost analog circuitry while avoiding ground loops, and also compensates for analog-channel imperfections.

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