pentode

pentode [ˈpɛntəʊd]

n

1. (Electronics) an electronic valve having five electrodes: a cathode, anode, and three grids

2. (Electronics) (modifier) (of a transistor) having three terminals at the base or gate

[from penta- + Greek hodos way]

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pentode  (pntd)

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.

Thesaurus

Noun

1.

pentode - a thermionic tube having five electrodes electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, vacuum tube, tube - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope