Developing a reconstruction filter for the DAC in PlainDAQ, to get nice looking sinewaves.
Compared Sallen-key(SK) and Multiple feedback(MFB) topologies.
MFB performed much better in the stop-band.

LTSPICE files:

https://github.com/AlperenAkkuncu/PlainDAQ/tree/main/Development/SPICE_simulation/Active_filter_comparison

I had to choose between sallen-key or Multiple feedback topology, so I compared them.

Here are the circuits that I compared:

Here are the results:

Multiple feedback performed much better in attenuating the stop band.

Added them to the schematic in my KiCAD project. I also added a switch to switch between filtered and non-filtered DAC output to see the difference between, it's going to be a fun little experiment.

With the help of the switch I will be able to generate square waves with faster rise-time by using the non-filtered DAC output which is a plus.

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