On 8/28/2013 2:33 PM, peter chadwick wrote:
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Message Received: Aug 28 2013, 07:31 PM
From: "peter chadwick" <g8on@fsmail.net>
To: "Mike Waters" <mikewate@gmail.com>
Cc:
Subject: Re: [Amps] Electron HOLE flow
Scroggie's 1960 book "Principles of Semiconductors" talks of 'holes', and the
idea was old then.
I always found it confusing, especially when we got into majority and
minority conductors in transistors.
If you have to worry about minority carriers in a circuit, there's a
problem with the circuit.<:-)) Then again I never had to deal with
minority carriers except in the lab and lifetime measurements, or
explaining the theory. With the trades, that was where the vacant
stares came in.
They are usually only a problem when building devices and setting
frequency limits.
32 years in the semiconductor business and I much prefer tubes!
They aren't so bad, but I've always found electron flow easier to
explain to students.
Electron flow is real, while conventional current is a convenience "at
times."
73
Roger (K8RI)
73
Peter G3RZP
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Message Received: Aug 28 2013, 07:05 PM
From: "Mike Waters" <mikewate@gmail.com>
To: amps@contesting.com
Cc:
Subject: Re: [Amps] Electron HOLE flow
Absolutely it is an illusion. IIRC, that was erroneously introduced into
textbooks around 1970 the same time as the "electricity flows from positive
to negative" nonsense. Whoever came up with the latter never heard of
electron flow in a vacuum tube, among other things.
73, Mike
www.w0btu.com
On Wed, 28 Aug 2013 03:54:29 -0400, K8RI wrote:
>
> >They still refer to "hole flow" in introductory semiconductors.
>
> REPLY:
>
> "Hole flow" is an illusion, much like the moving lights on a theater
> marquee. If it helps to understand things fine, but holes don't move. It's
> more accurate to say a hole is created in one atom and disappears in
> another. For a brief time while the electron is in motion, there are
> actually two holes. Neither one "moves".
>
> 73, Bill W6WRT
>
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