英和和英

名詞

thermionic valve (複数形 thermionic valves)

1. (chiefly historical) An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc.

   Synonym: vacuum tube

   • 2012, George Dyson, Turing's Cathedral, Penguin 2013, p. 65:

     The age of electronics began in 1906 with Lee De Forest's invention of the vacuum tube, or, as the British (led by John Ambrose Fleming, whose work preceded De Forest's) described it, the thermionic valve.

派生語

• valve amplifier