I'm working on a frequency mixer project in which two analog voltage signals at two different frequencies (each <5 kHz) are considered. I'd like to add the two fundamental frequencies and return an analog output in real time. Can I do this digitally and how difficult it is compared to an analog approach?
My idea so far includes an ADC with a fast enough sampling rate, Python scipy (for filtering), and DAC for output.
I'm trying to go low cost (<100 bucks). As far as I'm concerned, I don't see a potential problem in this idea as an ADC with Msps can be obtained, the math process is fast enough, and the DAC can also have Msps sampling rate.
But as a chemistry student, I'm no professional at DSP, so please point out some of the potential flaws/drawbacks of this method and tell me if you'd recommend doing this in analog?
Thanks in advance.