SV: [sdiy] More MOSFET saw VCOs

[karl dalen]

There is a parameter that says "gate capacitance changes
with frequency"!

Do you se any differences regarding this parameter?

KD
--- Ian Fritz <ijfritz at earthlink.net> skrev:

> Hi gang --
> 
> I have put up two new saw VCOs on my temporary web page along with the one 
> posted previously.  The scope shots show the reset section of the saw and 
> the MOSFET gate voltage.
> 
> The first new one uses an LM311 comparitor to switch a BS170 MOSFET.
> 
> The second new one uses an LM311 operating from ground to 6V to switch a 
> VN0104 MOSFET.  This one tracks with zero error up to 20 kHz and goes 0.1% 
> sharp between 20 kHz and 40 kHz.
> 
> http://home.earthlink.net/~ijfritz/xfer.htm
> 
>    Ian
> 
>