>> I'm looking for a high current digital buffer. It needs to source and
>> sink> 200mA. Power supply will probably be 5V. I see some op amps
>> designed to> drive DSL lines with currents like this, but that seems
>> like overkill> since I only need 0V or 5V out. I'm driving this with a
>> square wave at> 3MHz or less. Several in a package would be nice.
> Needs tuning for speed, but consider.
> NPN + PNP bipolar Jelly beans.
> Connect bases.
> Connect emitters.
> PNP collector low
> NPN collector high
> Drive bases.
> Output from emitters.
> 2 cent buffer.
>
>
>           Russell McMahon
>

That appears to be what's inside some of the FET drivers. I call it a
complementary emitter follower. It looks like in small quantities it's
about 20 cents.

Thanks!

Harold

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