Re: How would one use NPN transistors only?
From: Jim Thompson (thegreatone_at_example.com)
Date: 06/10/04
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Date: Thu, 10 Jun 2004 16:26:26 -0700
On 8 Jun 2004 09:16:55 -0700, hantral337@yahoo.com (B) wrote:
>All:
>
>I am familiar with the typical amplifier using NPN, and PNP
>transistors. It just makes good common sense, even to lay people like
>me.
>
>What about amplifiers that use ONLY NPN transistors? How would that
>work? It may be elementary, but when I am trying to theorize that, it
>just doesn't make sense to me.
See my other posts.
>
>There are a few people now building amplifiers with only NPN
>transistors, and I understand the advantages, but I don't understand
>how they make it work.
There is NO advantage except *perhaps* cost. PNP-NPN combos to
emulate a power PNP are potentially unstable and are difficult to
match loop gain for positive and negative swing directions.
...Jim Thompson
-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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