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Linear optocoupler for instrumentation

2017-03-17 02:06  
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A dual optocoupler is used in a configuration which has the same current throughout as the LEDs. Assuming similar optocoupler features the output voltage must be equal to the non-inverting input voltage. Since the op amp is within a closed loop the output voltage becomes equal to the input voltage.
Linear optocoupler for instrumentation

Rc and C perform as a compensation network to prevent oscillations.

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