AS3320 vcf schematic checkup

AmpedVoltz · Joined: Apr 17, 2020 Posts: 3 Location: Belgium

Hi synthfolks!

A while ago I've made a schematic for a filter based on the AS3320. One module contains 3 vcf's.

Now when I was testing the pcb's, there was only 5V coming out of the module. So maybe someone could have a look at the schematic for just one filter, and help me find my error? Smile

Thanks anyway! AV

https://docdro.id/o5E4nAj

Grumble · Posted: Sat Apr 18, 2020 3:17 am Post subject:

How are you measuring this voltage? Ac or DC? And where?
If you are measuring at the AUDIOUT1:
Since this output is capacitively coupled with a resistor to GND level, you should be measuring no DC voltage.

AmpedVoltz · Joined: Apr 17, 2020 Posts: 3 Location: Belgium

Grumble · Posted: Sat Apr 18, 2020 12:47 pm Post subject:

AmpedVoltz · Joined: Apr 17, 2020 Posts: 3 Location: Belgium

Grumble · Posted: Mon Apr 20, 2020 12:10 am Post subject:

If you followed the diagram correctly, it is not possible to measure a dc voltage at the output.
So check check, double check your build.

Electric Druid · Joined: Mar 13, 2012 Posts: 44 Location: UK

Hey AmpedVoltz, did you ever get to the bottom of this?