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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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