Add a 47uF and 100k as per the output of the waveshaper (same as the ATSO
output). That will give you a waveform centered around 0V.
Ken
both VCOs, the sine itself is 3V p-p. I double checked my wiring and the
orientation of all significant components, changed the 240K offset resistor
in the first part of the circuit to 580K to centre the saw wave around zero,
put in another LM3900, but all to no avail.
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
output). That will give you a waveform centered around 0V.
Ken
>Hello,works fine, except there appears to be a 1V DC offset on the sine output of
>
>I just wired up two VCOs (ver. 1.0 boards) and tested them. Everything
both VCOs, the sine itself is 3V p-p. I double checked my wiring and the
orientation of all significant components, changed the 240K offset resistor
in the first part of the circuit to 580K to centre the saw wave around zero,
put in another LM3900, but all to no avail.
>_______________________________________________________________________
>Has anyone encountered similar problems?
>
>Regards,
>
>Johannes
>
>
>
>------------------------------------
>
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Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>