Re: LF: re TC44 etc

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Re: LF: re TC44 etc

from [Joe Craig]

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To:	"LF-Group" <[email protected]>
Subject:	Re: LF: re TC44 etc
From:	"Joe Craig" <[email protected]>
Date:	Wed, 21 Jan 2004 10:21:25 -0330 (NST)
In-reply-to:	<001301c3dfbe$cc459b80$6507a8c0@Main>
References:	<001301c3dfbe$cc459b80$6507a8c0@Main>
Reply-to:	[email protected]
Sender:	<[email protected]>



On Wed, 21 Jan 2004, Alan Melia wrote:

Hi Dick, it is not really all that necessary to use that chip. It is quite
possible to drive the gates quite adequately with a PNP-NPN totem pair
(emitter followers...the emitters to the output ...npn top pnp


I've been using this method to drive an IFR640 for almost a year.
The gate voltage is a bit dirty, but the output seems fine.
I'm using Class E per Alan's spreadsheet design.

Joe

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