| 释义 |
photodiode Electronics.|fəʊtəʊˈdaɪəʊd|
Also with hyphen.
[f. photo- 1 + diode a., n.]
A semiconductor diode which generates a potential difference or changes its electrical resistance when illuminated.
1945S. Benzer Photoelectric Effects in Germanium (U.S. Dept. of Commerce, Office of Publication Board PB 28644) 3 In exploring germanium samples for their rectification at different points, uncommon current-voltage characteristics are sometimes observed. There are two types which are of particular interest because of their sensitivity to light... K. Lark-Horovitz has given the descriptive names ‘photodiode’ and ‘photopeak’ to these characteristics. Ibid. 4 Even in the most highly saturated photodiodes, the current continues to rise somewhat as the voltage is raised. 1959[see phototransistor]. 1962Jrnl. Optical Soc. Amer. LII. 1237/1 Large-area photodiodes have been in use for a number of years as solar cells for the conversion of solar radiation to electrical power. 1971Nature 20 Aug. 540/1 The photometers are protected from excessive light levels by protective photodiodes which disconnect the high voltage supply at times when the light level is above a minimum value. 1975D. G. Fink Electronics Engineers Handbk. xi. 67 Figure 11-55 is a cross-sectional diagram of a metal semiconductor (Schottky barrier) photodiode. 1978Gramophone Jan. 1322/2 A light beam from a heliumneon laser scans the track and the reflected light is directed towards a photodiode which converts the light variations into a corresponding electrical signal for decoding and relaying to the aerial socket of a standard TV set for viewing and listening. |