If a transistor was a triode, then... (dumb JN questions)

[kf6pqt]

Then the base of the transistor would be analogous to the grid of the triode... that much I get.

But would the collector be analogous to the cathode, and the emitter to the plate?

Or do I have that backwards? Or do I have the whole thing wrong?

I'm tryun to understands me them new-fangled transit-critters. 

Thanks,

Jason kf6pqt

[N0WVA]

The plate wud b da collector, thuh cathode the emitter , the grid wood bee duh base.

There are no electrons. Just think of the transistor as a pencil precariously resting on the edge of a table. Just one breath would make it fall, then it instantly returns back to the state of "seminesss" as in "semiconductor".  They dont know whether they want to conduct or insulate, so just crossing your eyes and staring at them causes them to "flip out".

[Tom WA3KLR]

That's the bipolar transistor.

For the field effect transistor:
the gate = grid
the source = cathode
the drain = plate.

The flow through the device is electrons; your most hollow-state-friendly transistor, and in many ways.

[The Slab Bacon]

Fet is the tranzista that most closely electrically resembles a triode tube.

A bipola tranzista needs a small current flow between the base and the emitta to produce a current flow from the emitta to the collecta.

A field effect tranzista (at least in theory) needs no current flow between the zorce and da gate to produce a current flow between the source and the drain. It relies on the presence of an electric field to attract or repel the flow ov electronz thru the device.

Howeva here is where it can get a bit dicey, there are enhancement and depletion type fetz. This is the classifikation ot their conduction state with 0 biass in the gate.

All of that crap can get confuzing, scrwe that I'll stick with my tubez!!

                                      The Slab bacon

[WA1GFZ]

Then there are the p channel devices.
A gate takes no juice till you want to crank high speed. Then the gate is a hog because you have to charge and discharge the gate C.

[kf6pqt]

Thanks all, good stuff!

[WA1GFZ]

The main thing is when a tube lights up you know it is working. When a FET lights up you know it is dead.

[The Slab Bacon]

The main thing is when a tube lights up you know it is working. When a FET lights up you know it is dead.

that is a great one!! I love it!

[Pete, WA2CWA]

Back in my college days with semiconductor courses, there was "electron flow" and "hole flow".

Hole Flow: Current carriers (in transistors) which have a flow in a direction opposite to electron movement.

Electron Flow: Is the flow of free electrons in a semiconductor.

[KF1Z]

The main thing is when a tube lights up you know it is working. When a FET lights up you know it is dead.

well, that answers THAT!


(actually, you would see a bit of glow if the FETs were mounted in a clear package....)

[David, K3TUE]

(actually, you would see a bit of glow if the FETs were mounted in a clear package....)

THAT would be cool.