phototransistor


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Related to phototransistor: Optocoupler

pho·to·tran·sis·tor

 (fō′tō-trăn-zĭs′tər)
n.
A transistor that regulates current based not on an electrical signal but on the intensity of light hitting its photosensitive base.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

phototransistor

(ˌfəʊtəʊtrænˈzɪstə)
n
(Electronics) a junction transistor, whose base signal is generated by illumination of the base. The emitter current, and hence collector current, increases with the intensity of the light
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
An optical sensor (LED and phototransistor) and weight are attached to the ear sensor.
The optocoupler consists of an aluminum gallium arsenide (AIGaAs) infrared light-emitting diode (LED) optically coupled to a phototransistor, available in a compact half-pitch, mini-flat, 4-pin package.
The phototransistor is connected in the voltage divider and the signal from the optical sensor is filtered by an active lowpass filter with the limiting frequency of 1.6 kHz and the amplification 10.
Instead of, a phototransistor relatively expensive we simply used an infrared LED for the signal reception and the product signal does not require amplification as the distance between the transmitter and receiver is small.
Graphene Bilayer field effect phototransistor for terahertz and infrared detection.
Optocoupler consists of LEDs on one side and a photodiode, phototransistor, or triac photocathode on the other side.
Designated the OPB200, the optically-triggered switch contains an 890 nm infrared LED and a phototransistor paired in an opaque plastic housing.
For example, the selling price of the firm's phototransistor couplers will rise 10% in the month.
It incorporates a lensed IR LED and phototransistor elements to collimate the light beam for enhanced resolution at a detection range from 0.4 to 1.0 in.
Follow Drawing 2, and insert the leads from the phototransistor and LED in holes as shown.
The principle employed is that of optic coupling of the phototransistor 9 placed in the stationary part with the LED 3 mounted coaxially in the cylinder block.
In the impeller displacement transducing part, a switching circuit composed of a light-emitting diode and a phototransistor, etc.