Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
References: <firstname.lastname@example.org> <3DEDD933.email@example.com> <firstname.lastname@example.org>
Subject: Re: Amplifying stage with *negative* Voltage gain??
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Wed, 4 Dec 2002 11:21:43 -0000
NNTP-Posting-Date: Wed, 04 Dec 2002 11:21:51 GMT
fred bartoli wrote:
> Kevin Aylward a écrit dans le message :
>> Rene Tschaggelar wrote:
>>> A negative gain is inverting. Your gain is just smaller than 1.
>> This is debatable. It depends on whether one is stating gain in db or
>> not. negative db's are gains less than one not inverting, and
>> arguable, people quote gains in db more often than they do straight
> Also note that a negative gain is always smaller than 1.
Ahh...AHmm....yes subtle point...
If gains are in dbs, then negative gain is always smaller than 1, but if
gain is specified as a simple ratio, then negative gains usually imply
the *magnitude* of gain ratio, which does not have to be less then one.
i.e. if some one says a "gain of -4.2", they don't usually mean a gain
less than then 1 as a raw application of the mathematics would
indicate!. They mean an inverting gain of 4.2.
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