Ultra low frequency sawtooth oscillators

[René Schmitz]

Hi Heiko!

Check out the VCO-3 at my website. Goes down to 15Min/cycle. 
The circuit carefully avoids the leakage of the reset switch.

Bye,
 René


At 09:28 20.04.00 +0200, Heiko van der Linden wrote:
>
>Hi All,
>
>Does anyone know places where I can find schematics for ultra low frequency
>saw tooth oscillators.
>I want to make such an oscillator for a sweep generator in a low frequency
>gain-frequency analyser.
>The sweep time should at least be able to be 10 minutes (1.66milliHz)
>
>Also which components should be carefully selected ? For instance if an
>opamp integrator is used
>the timing capacitor should be a low leakage type to avoid timing
>non-linearities.
>
>Bye,
>Heiko
>
>

transconductance | uzs159 at uni-bonn.de
isfutilepreparet | http://www.uni-bonn.de/~uzs159
obeassimilated.. | http://members.xoom.com/Rene_Schmitz