(Named after Harry Nyquist.) The sampling rate required to convert an analog signal into a digital signal. The sampling frequency must be greater than twice the bandwidth of the input signal to perfec [..]

The reciprocal of the Nyquist interval, i.e., the minimum theoretical sampling rate that fully describes a given signal, i.e., enables its faithful reconstruction from the samples. Note: The actual sampling rate required to reconstruct the original signal will be somewhat higher than the Nyquist rate, because of quantization errors introduced by th [..]