I'm using a Raspberry Pi 2 and an AD/DA Board, with no extra circuit. Reading on the internet though, I found that DACs need a low pass filter in their output, and I don't understand if the behaviour of my DAC is normal, and I wonder if I need the low pass filter. Its output goes down to 0V at every sample, is it normal? Is this the reason why low pass filters are used?
Thanks in advance,
Alberto
I tried with a better oscilloscope to analyze the signal, and it's all fine. I'm so sorry if I created a useless thread, but I still have learnt new terms I didn't know before.
1 0 2 0 3 0 4 0 5 0 6 0...
and so on (?) or is it that the DAC outputs a few values and then drops to zero and stays there? Also, is this simulation or an actual DAC in a circuit? $\endgroup$ – A_A Nov 23 '16 at 8:52