Summary of AD sampling problems

Description: Source http://bbs.csdn.net/topics/390899032 Forum Discussion

A 100HZ sine wave, I use the sampling rate of 300HZ to sample, then according to Shannon Law is not a second to collect 300 points, because this waveform is 100HZ, so this one second there are 100 waveforms, then 300 points on average to each waveform on only 3 points, That is, 3 points are collected on a waveform,

The sampling rate is typically in SPS rather than Hz, such as 300Sps, or Samples Per Second.
100Hz sine, with a 300Sps sampling rate, the average period of each sine cycle can only have 3 points, this signal is produced is very bad. To ensure that the signal amplitude as small as possible distortion, it is best to choose a sampling ratio of 50 times times more than the sampling theorem proposed twice times, the sampling theorem twice times is only a theoretical limit.

Summary of AD sampling problems