OPTICALLY ISOLATED ANALOG MULTIPLEXER

  
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The circuit described here provides three channels of optically isolated input that will work for many precision signal-acquisition applications. The only power required is a single 15-V rail with ground common to the analog-to-digital converter. Multiplexer operation is based on an ordinary quad-channel optoisolator (PS2501-4). Each LED (such as E1) in comb..
OPTICALLY ISOLATED ANALOG MULTIPLEXER - schematic




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