A transistor that responds to light striking it by generating and amplifying an electric current.
More example sentences
- It contains an infrared light-emitting diode as a light source and a phototransistor as a light detector.
- The output phototransistor features a 30 V collector-emitter voltage and 5 V in the opposite direction.
Definition of phototransistor in:
- The British & World English dictionary