I have this circuit connected to an Arduino DUE.
It is an audio application and it works, but I have a ton of noise in my project. I initially thought it was quantization noise because the ADCs are 12 bit.
After consulting forums, I was told it was probably due to lack of decoupling.
So I searched online, and while I did understand a lot of theoretical stuff, I have no practical clue as to how to decouple this circuit. What type of capacitors to place, where and what value should they have...?
My design has 3 external ICs:
TL072 (x2) These are the operation amplifiers. Each chip contains two op-amps, so for the 4 op-amps you see in the circuit, there are two chips.
TC1044 Charge pump DC-DC voltage converter, to generate the -5V rail.
Here are links to the datasheets: TL072 : http://www.ti.com/lit/ds/symlink/tl074b.pdf TC1044: http://ww1.microchip.com/downloads/en/DeviceDoc/21348a.pdf
No comments:
Post a Comment