Photo Transistor

Photo Transistor. What Is phototransistor?Phototransistor ApplicationsTypes of PhototransistorsOther Phototransistor Types Or Variants• It is a transistor controlled by exposure to light It is similar to photodiode controlling anordinary bipolar transistor • It can be either bipolar transistor or field effect transistor (FET) • Its body is encased in resin or plastic or encased in a metal shell with window in it • The figure1 depicts most common variant of phot.

The phototransistor is enclosed inside the opaque container so that the light particles or photons are easily reached on their surface The collector region of the phototransistor is large as compared to the ordinary transistor because it is made up of heavy diffuse semiconductor material When the base of the phototransistor absorbs light they release the electronhole.

Phototransistor vs. Photodiode: Which Detector is Best

The phototransistor is widely used in electronics devices likes smoke detectors infrared receiver CD players lasers etc for sensing light Photodiode Vs Phototransistor The photodiode and phototransistor both convert the light energy into the electrical energy But the phototransistor is mostly preferred over the photodiode because of their following advantages The current gain.

PHOTOTRANSISTOR Datasheet(PDF) NTE3031 NTE Electronics

A phototransistor can be brought into common collector common emitter or other standard transistor configuration to extract current When no light is incident on the device they operate just like any other transistor (as a 3terminal device) Once light is incident on the device it is absorbed in the base This is equivalent to increasing the base current into the device Because.

Phototransistor an overview ScienceDirect Topics

The fact that phototransistors are easy to use and perform well within their limitations means that these semiconductor devices are used in a wide variety of electronic circuits Often the applications are where a light beam is interrupted but sometimes they can be used for light leveInitial Development of The PhototransistorPhototransistor OperationPhototransistor Circuit SymbolPhototransistor StructurePhototransistor CharacteristicsSummary of Advantages and Disadvantages of PhototransistorsThe phototransistor uses the basic bipolar transistor concept as the basis of its operation In fact a phototransistor can be made by exposing the semiconductor of an ordinary transistor to light Very early photo transistors were made by not covering the plastic encapsulation of the bipolar t.