单词 | photoformer |
释义 | > as lemmasphotoformer photoformer n. Brit. /ˈfəʊtə(ʊ)fɔːmə/ , U.S. /ˈfoʊdoʊˌfɔrmər/ Electronics an apparatus for generating a voltage corresponding to a given curve, incorporating a cathode ray tube, a photoelectric cell, and an intervening opaque mask with an edge cut to the shape of the curve.ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > electronic instruments > [noun] > device generating specific wave-shapes photoformer1949 1949 Electronics Feb. 100/1 The Photoformer, as it is called since it generates waveshapes through the use of a cathode-ray tube and phototube, is fed with a sawtooth voltage of the desired frequency. 1965 Math. in Biol. & Med. (Med. Res. Council) i. 38 Figure 3 shows how an analogue computer is used to resolve such a curve into its components... A voltage generated from the curve by a photoformer is compared with the sum of exponentials generated in the computer. < as lemmas |
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