| 单词 | variable-mu |
| 释义 | > as lemmasvariable-mu variable-mu adj. Electronics (of a valve) having an amplification factor that can be varied. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [adjective] > specific types of valve thoriated1922 bright-emitting1924 multi-electrode1926 variable-mu1930 planar1937 1930 Ballantine & Snow in Proc. IRE 18 2102 (heading) Reduction of distortion and cross-talk in radio receivers by means of variable-mu tetrodes. 1962 Newnes Conc. Encycl. Electr. Engin. 860/1 A coarse-pitch grid gives a low magnification and requires greater bias to cutoff. In the variable-mu valve the grid is graded, and this gives a valve whose gain can be altered by changing the bias applied to it. 1971 E. N. Lurch Fund. Electronics (ed. 2) v. 143 The tube employing this special grid is termed cutoff, supercontrol, or variable-mu. < as lemmas |
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