| 释义 |
phototransistor Electronics.|ˌfəʊtəʊtrɑːnˈzɪstə(r), -æ-|
Also with hyphen.
[f. photo- 1 + transistor.]
A junction transistor which responds to incident light by generating and amplifying an electric current.
1950J. N. Shive in Bell Lab. Rec. XXVIII. 337/2 Experiments have resulted in the production of a new photoconductivity cell, called the ‘Phototransistor’. 1959Control Feb. 95/2 It is a logical step from the photodiode to the p-n-p phototransistor, in which the amplifying action of the transistor is applied to the photocurrent. Ibid., The Mullard OCP71 phototransistor is enclosed in a glass bulb 5·9 mm in diameter and 15 mm in length. 1959Electronic Engin. XXXI. 36 The advent of the commercially produced junction photo-transistor has brought with it the possibility of operating a relay directly from the light sensitive element. 1962P. M. Williams in G. A. T. Burdett Automatic Control Handbk. ix. 52 Photo⁓transistors can be made which are sensitive to X-rays, ultra violet and infra red. 1970New Scientist 24 Dec. 554/1 The new reading head is only a few centimetres across and contains a matrix of 144 bipolar photo⁓transistors on a silicon chip 3 × 5 mm in size. |