search for switchers

[Rene Schmitz]

At 15:49 24.11.99 +0100, Martin Czech wrote:
>On the search for good switchers I found the following NMOST:
>
>BS170 (bulk to source)
>BS107 (bulk to source)
>BFR29 (bulk connection)
>BSV81 (bulk connection, low Igs, low Isd)
>
>All seem to have no ESD-protection, this is good, because
>virtually no Igs, Igd, Igb. Of course only if you don't
>zap them.
>
>Any experiences, comments on those?

I've used BS108 and BS250 as discharge switches in relaxation Oscillators. 
I guess they're similar to the BS107 / BS170. One thing to watch out for is 
the gate-channel capacitance. The BS108 has some 50pF. This might lead to 
unwanted spikes in switching applications. 

Bye
 René

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