what is a triode?

Question

i know wat is a diode but i'm not sure abt wat a triode is...can anuone explain to me abt it and some of its applications?

Answer 1

A triode is a type of vacuum tube (or valve in British English) with three elements: the filament or cathode, the grid, and the plate or anode. The triode vacuum tube was the first electrical amplification device. The principle of its operation is that, like in a vacuum tube based diode, the heated filament causes a flow of electrons that hit the plate and create an electric charge to it. The control grid is then charged negatively to repel some of the (also negatively charged) electrons back towards the filament: the larger the charge on the grid, the smaller the charge created on the plate.

The original three-element device was invented in 1906 by Lee De Forest who called it an Audion. The Audion did incorporate, in an imperfect form, the key principle of allowing amplification. The name triode appeared later, probably when it became necessary to distinguish it from other generic kinds of vacuum tubes with more elements (Tetrodes, Pentodes). The original Audion tubes were not vacuum tubes however, as they deliberately contained some gas at low pressure. The name triode is only applied to vacuum tubes.

Triodes are largely obsolete, having been replaced by the transistor, but do still find application where power consumption and overall size are not concerns, but low component count and high power capacity are. They are also still valued by musicians and audiophiles for amplification purposes, as some claim that triodes are still more linear at audio-frequency ranges and have less musical distortion characteristics.

You could get more information from the link below...

Answer 2

Source: www.vintage-technology.info/pages/frontpages/glossary.htm

1. A valve (or modernly, an electrical device) that has three electrodes; and anode, a cathode and a third electrode (usually a grid) that allows the modulation of the current between the other two.
www.vintage-technology.info/pages/frontpages/glossary.htm

2. A three-element electron tube, containing a grid, cathode, and plate as active elements, in addition to the filament.
www.aikenamps.com/AmpTerms.html

3. A thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which making amplification possible
wordnet.princeton.edu/perl/webwn

4. A triode is a type of vacuum tube (or valve in British English) with three elements: the filament or cathode, the grid, and the plate or anode. The triode vacuum tube was the first electrical amplification device and still remains in use for amplification purposes, especially in AF application where the "tried and true" are revered at a premium.
en.wikipedia.org/wiki/Triode

U can also check in these websites for more information:
www.answers.com
www.dictionary.reference.com

Answer 3

A triode is a vacuum-tube device.

Tube diodes have one hot electrode and one cold electrode. Electrons are driven off the hot element and can pass to the cold one, but not the other way around.

If you add a metallic screen in the middle, you can apply a charge to that and control how much of the electrons flow through. This is a simple triode.

The solid state equivalent to a triode is a transistor.

Answer 4

One triode tube would be linked to variety a RF detector . Then build it as an elementary AM receiver that for the time of basic terms may be used interior of 5 miles from AM station. This circuit demands to apply intense impedance 10K ohms head set which isn't able to acquire nowaday. FM band radio by no potential would be equipped with one triode even 2.

Answer 5

simply, a vacume-tube device,having three terminals(plates)-anode,cathode and gride(same as emiter,base,collector) and used for amplifying current,voltage,power.

Answer 6

probably it has 3 points?? and stil functions as a diode??