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Frequency/Voltage Converter With Optocoupler Input

2016-01-18 22:09  
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In this circuit, the input from IC2 optocoupler is fed to the comparator input of the AD
Frequency/Voltage Converter With Optocoupler Input

650 (Analog Devices or Maxim Electronics) V/F converter. This internally generates a pulse that is fed to the op amp, which outputs a dc voltage that is proportional to frequency. Component values are shown in the figure.

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