cmos       : CD4093
ttl        : 7413 or equivalents
comparators: LM393, LM111
discrete   : two transistors

The slew rate does not count too much because any schmitd trigger designed
with operational amplifiers use the comparator structure ( positive
feedback ) which increase the slew rate.

Vasile

On Tue, 26 Feb 2002, Edson Brusque wrote:

> Hello,
>
>     inspired by the recent thread about "Switching low voltage AC", I'm
> returning to the development of a solid state relay using MOSFETs.
>
>     I'm trying various configurations of MOSFET drivers, but what I really
> need is a schmitt trigger with some mA capabilities. A schmitt trigger can
> be done with an op-amp, but the slew-rate of the opamps I know can swing to
> GND and VCC is very slow.
>
>     Any sugestions?
>
>     Thank you very much,
>
>     Brusque
>
> -----------------------------------------------------------------
> Edson Brusque                 C.I.Tronics Lighting Designers Ltda
> Researcher and Developer               Blumenau  -  SC  -  Brazil
> Say NO to HTML mail                          www.citronics.com.br
> -----------------------------------------------------------------
>
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