The effects of the delays due to signal multiplexing and processing is to add a...

The effects of the delays due to signal multiplexing and processing is to add a phase shift to the response. To have a stable noiseless loop, the additional phase shift at the cut off frequency of the loop must be negligible (say maximum of 200). Which means that signal multiplexing and processing rate must be at least 1KHz for a 50 Hz cut off frequency. We should have higher sampling rate of around 2KHz to have better noise free and stable feedback loop.