AC / DC coupling question

MikMo
Senior Member

Posts: 475

AC / DC coupling question Apr 10, 2020 10:15:09 GMT

Quote

Post by MikMo on Apr 10, 2020 10:15:09 GMT

Some of the AE modules have the ability to accept both Audio and CV signals on their inputs. Then there is a switch to select CV / Audio.

What does the switch do ?

Since all signals are 0-5V my (not very qualified) guess is that it is just AC coupling or DC coupling and the switch simply switches a capacitor in/out of the input line ?

Is that correct ?

If so, what value capacitor is used ?

Mikael / MikMo

robertlanger Administrator Posts: 605	AC / DC coupling question Apr 10, 2020 13:10:14 GMT NightMachines, MikMo, and 1 more like this Quote Select Post Deselect Post Link to Post Back to Top Post by robertlanger on Apr 10, 2020 13:10:14 GMT Basically you are right:-) For Audio, a capacitor is into the input line, followed by a voltage divider that forces the 2.5 volts offset. The schematic:

MikMo Senior Member Posts: 475	AC / DC coupling question Apr 10, 2020 14:03:28 GMT young Protoboard likes this Quote Select Post Deselect Post Link to Post Back to Top Post by MikMo on Apr 10, 2020 14:03:28 GMT Thank you Robert. So basically the audio level s centered around 2.5V.
	Last Edit: Apr 10, 2020 14:05:59 GMT by MikMo

AC / DC coupling question

Post by MikMo on Apr 10, 2020 10:15:09 GMT

Post by robertlanger on Apr 10, 2020 13:10:14 GMT

Post by MikMo on Apr 10, 2020 14:03:28 GMT