| 单词 | bright emitter |
| 释义 | > as lemmasbright emitter bright emitter n. Electronics (now chiefly historical) a thermionic valve in which the filament operates at a high temperature, and so glows brightly; (also) such a filament; opposed to dull emitter n. at dull adj. Compounds 2.Frequently (and recorded earliest) as a modifier. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve vacuum tube1859 trigger tube1894 audion1906 pliotron1915 diode1919 electron tube1919 negatron1919 pentode1919 power valve1919 tetrode1919 triode valve1919 magnetron1921 bright emitter1923 peanut valve1923 peanut1924 power tube1924 multiple valve1929 thyratron1929 heptode1932 hexode1933 pentagrid1933 acorn tube1934 octode1934 triode-pentode1936 triode-hexode1937 transitron1939 trochotron1947 steering diode1957 1923 Daily Mail 9 Nov. 7/5 The newest dull emitter consumes .06 ampere at 2.5-3 volts, which..represents..approximately one-fifteenth of the energy required by the older type of bright emitter valves. 1970 D. F. Shaw Introd. Electronics (ed. 2) x. 209 Oxide-coated cathodes..glow a dull red and they are therefore called dull emitters, contrasted with tungsten filaments which are bright emitters. 2005 B. A. Hennessy & J. Hennessy Emergence Broadcasting in Brit. v. 185 The last stage [of amplification] consisted of four valves in parallel, these being bright emitters and giving such a strong glare that it was necessary to shield the valves. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。