The optocouplers are available in the IC form MCT2E is the standard optocoupler IC which is used popularly in many electronic application.
· This input is applied between pin 1& pin 2. An infrared light emitting diode is connected between these pins.
· The infrared radiation from the LED gets focused on the internal phototransistor.
· The base of the phototransistor is generally left open. But sometimes a high value pull down resistance is connected from the Base to ground to improve the sensitivity.
· The block diagram shows the opto-electronic-integrated ciruit (OEIC) and the major components of a fiber-optic communication facility.
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