Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
Subject: Re: Ebers-Moll equation
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Mon, 2 Dec 2002 10:38:32 -0000
NNTP-Posting-Date: Mon, 02 Dec 2002 10:38:40 GMT
> Jonathan Kirwan wrote:
>> On Fri, 29 Nov 2002 16:12:19 -0000, "Kevin Aylward"
>>> Rick wrote:
>>>> Paul Burridge wrote:
>>>>> Can some kind soul post the E-B equation that describes the
>>>>> behaviour of BJTs? Also, how accurate is this model and does it
>>>>> contain everything one needs to know about BJT behaviour in
>>>> Ic = Is ( exp(Vbe/Vt) - 1 )
>>> This is not the Ebers-Molls equation. This is just the one diode
>>> equation. Ebers-Moll includes both diodes.
> The Ebers-Moll equation doesn't include both diodes
There is no such thing as the "Ebers-Moll equation". Period. There is
the "diode equation", and the "Ebers-Moll equations" or "Ebers-Moll
model". Hence, an interpretation was made as to what it was believed
what the poster wanted.
>- it's the
> Ebers-Moll *model* which includes both diodes.
> The OP explicitly asked for the emitter-base equation...
The response was to what was deemed the poster *required*, not to his
exact wording. It is clear from his wording that he was a little
confused on terminology.
> Can some kind soul post the E-B equation that describes the behaviour
> of BJTs? Also, how accurate is this model and does it contain
> everything one needs to know about BJT behaviour in isolation?
I agree he says "equation". However, the text suggests that he required
"equations" but was unaware of the distinction.
"...describes the behaviour of BJTs?...", implicity implys more than one
equation, but the poster might be unware of this.
"..how accurate is this model..", would again seem to be a referance to
the Ebers-Moll model, not a single equation.
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