Hello,
I just wired up two VCOs (ver. 1.0 boards) and tested them. Everything works fine, except there appears to be a 1V DC offset on the sine output of 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
I just wired up two VCOs (ver. 1.0 boards) and tested them. Everything works fine, except there appears to be a 1V DC offset on the sine output of 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