How Does a Potential Effect Transistor Work?

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Discussion Overview

The discussion centers around the workings of a potential effect transistor (PET), exploring how current is controlled by changes in potential. Participants seek clarification on the terminology and functionality of PETs in comparison to other types of transistors, such as BJTs and FETs.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants express uncertainty about the term "potential effect transistor" and suggest it may refer to bipolar devices like BJTs or unijunction transistors (UJTs).
  • One participant notes that the term PET has been used historically but is not commonly found in modern literature, indicating a potential confusion in terminology.
  • Another participant explains the operational differences between FETs and BJTs, highlighting that FETs utilize capacitive displacement current to create a conducting path, while BJTs and UJTs rely on direct conduction.
  • There is a mention of "minority carrier device" for BJTs and "majority carrier device" for FETs, which relates to charge carrier distribution in semiconductors.
  • A participant seeks further technical information and resources regarding PETs, indicating a desire for more detailed understanding.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the definition and usage of the term "potential effect transistor." There are multiple competing views regarding its classification and relation to other transistor types.

Contextual Notes

The discussion reveals limitations in the clarity of terminology and the historical context of the term PET, which may not align with modern definitions and classifications of transistors.

Excom
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Hi

Is there any one, that can explain how a potential effect transistor, PET, works?

I would like to know how the current is controlled by changes in the potential.

Thanks
 
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Excom said:
Hi

Is there any one, that can explain how a potential effect transistor, PET, works?

I would like to know how the current is controlled by changes in the potential.

Thanks

Google and I've never heard of it. Can you provide a pointer to some technical information?
 
New one on me also.

Looks like it is just another name for a bipolar device. BJT. or perhaps a unijuction?
 
Over the years many naming conventions have been used. The 2 basic types of transistors commonly in use today are the FET & the bjt. A search can turn up a wealth of info on both with equations & detailed diagrams. I've heard of the term PET used to describe non-FET devices like ujt's & bjt's. A FET uses capacitive displacement current to create an inversion layer of charge and create a conducting path. A bjt & ujt works by direct conduction, i.e. no insulating gate (MOSFET) or reverse biased junction (JFET).

It isn't a good descriptive term. The best terms to describe modern FETs & bjt's at the semiconductor physics level is "minority carrier device" for a bjt, & "majority carrier device" for a FET.

The "minority" & "majority" terms refer to the charge carrier distribution inside the semiconductor material. "PET" is not used in modern literature. I've heard the term used, but how it got coined is something I don't know. I believe it refers to creating a direct conducting channel by forward biasing a p-n junction (base-emitter) in a bjt (or ujt). A FET displaces charges to form a conducting channel. Does this make sense?

Claude
 
Thanks for the answers.

Now it makes sense.
 

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