Share this entry

Share this page


Line breaks: photo|tran¦sis¦tor
Pronunciation: /ˌfəʊtəʊtranˈzɪstə
, -trɑːnˈzɪstə, -ˈsɪstə/

Definition of phototransistor in English:


A transistor that responds to light striking it by generating and amplifying an electric current.
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:

Share this entry

Share this page


What do you find interesting about this word or phrase?

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Top searches

= trending
Word of the day vicarious
Pronunciation: vɪˈkɛːrɪəs
experienced in the imagination through another person's feelings…