pentode

pentode [pen-tohd] ExamplesWord Origin noun Electronics.

1. a vacuum tube having five electrodes, usually a plate, three grids, and a cathode, within the same envelope.

Origin of pentode 1915–20; pent- + -ode2 Examples from the Web for pentode Historical Examples of pentode

Remember how he went to all the trouble of building a pentode vacuum tube for a job that could have been done by transistors.

Anything You Can Do

Gordon Randall Garrett

British Dictionary definitions for pentode pentode noun

1. an electronic valve having five electrodes: a cathode, anode, and three grids
2. (modifier) (of a transistor) having three terminals at the base or gate

Word Origin for pentode C20: from penta- + Greek hodos way pentode in Science pentode [pĕn′tōd′]

1. Any electron tube with the basic structure and functionality of a triode, but including two extra electrodes, a screen and a suppressor grid. The screen helps the tube respond well at high frequencies (as in a tetrode), while a negatively charged suppressor grid adjacent to the plate prevents secondary emission of electrons from the plate, increasing the efficiency of the tube. See more at suppressor.