alt Hacker NewsEvery non-linear mixing of signals gives you sum and difference frequencies. It's less a weird PLL thing and more a weird trig function thing.
Every non-linear mixing of signals gives you sum and difference frequencies. It's less a weird PLL thing and more a weird trig function thing.
Its not even a non linear thing. Its a sampling thing. Even ideal sampling exhibits aliasing.
https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampli...