Phototransistor

A transistor in which an amplified current is generated when light falls on the base-collector junction.

phototransistor

transistor in which the current produced by the photoelectric effect in the neighbourhood of the emitter-base junction acts as base current which is amplified
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=521-04-51

phototransistor

photoelectric detector that uses semiconductors in which the photoelectric effect is produced in the neighbourhood of a double p-n junction (p-n-p or n-p-n) which possesses amplification properties
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-05-41
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