Using Arduino as a DSP phase shifter

Is it possible to use an Arduino as an active phase shifter. Where the analog circuit takes in a signal from the enviornment and then shifts is prescribed amount and converts the new signal back to analog?

See attached circuit below.

I am hoping the triangle wave generator will give me spread spectrum across a range of frequencies rather than just a single frequency.

Thank you

DSP project.pdf (128 KB)

One could implement an phase shifter at audio frequencies in Arduino. It has no chance at the UHF radio frequencies your block diagram suggests.

Thank you for the help.