Question

Difference between photodiode and phototransistor

Answer 1

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One of the major difference between the photodiode and the phototransistor is that the photodiode uses PN-junction diode which converts the light energy into an electric current, whereas the phototransistor uses the ordinary transistor (NPN transistor) for the conversion of light into current. Some other differences between the photodiode and phototransistor are shown in the comparison chart

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