| 单词 | phototransistor |
| 释义 | phototransistor[ foh-toh-tran-zis-ter ] / ˌfoʊ toʊ trænˈzɪs tər / noun Electronics.a transistor that amplifies current induced by photoconductivity. Origin of phototransistorFirst recorded in 1945–50; photo- + transistor Words nearby phototransistorphotothermic, phototonus, phototopography, phototoxic, phototoxin, phototransistor, phototroph, phototrophic bacteria, phototropic, phototropism, phototropy Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for phototransistorphototransistor / (ˌfəʊtəʊtrænˈzɪstə) / nouna 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 & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for phototransistorphototransistor [ fō′tō-trăn-zĭs′tər ] A transistor that regulates current or switches it on and off based on the intensity of the light it is exposed to rather than an external electric signal. Phototransistors are used in many electric-eye applications, including digital cameras, in which millions of tiny phototransistors map an image into an array of electrical signals. See also photoelectric effect. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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