[sdiy] Tech question on saw VCO

patchell patchell at silcom.com
Thu Mar 6 15:53:29 CET 2003


    I have never actually seen that...but, it would be for compensating
for the input capacitance of the fet...I would think....(i.e..just like
you said, a speedup capacitor).

Tim Ressel wrote:

> Hey all,
>
> When connecting the output of the comparator to the
> gate of the FET, sometimes I see a resistor with a
> speed-up cap across it. My particular schematic has no
> such resistor/capacitor. Is it needed and/or
> important? I assume its either current limiting or
> oscillation supression.
>
> --Tim
>
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--
 -Jim
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