What is Nyquist frequency?
Half the sampling frequency. Components above it are folded back to lower frequencies when sampled (aliasing).
Field: AD/DA conversion
Nyquist frequency in the explanations
Half the sampling frequency is called the Nyquist frequency.
What sampling frequency is needed to sample an analog signa…Components above the Nyquist frequency (half the sampling rate) that reach an ADC fold back as false lower-frequency signals that can never be distinguished or removed afterward.
What type of filter is used as the anti-aliasing filter pla…The Nyquist frequency is 6 kHz, and 10 kHz exceeds it, so it folds back and appears at |fs − f| = |12 − 10| = 2 kHz (aliasing).
If a 10 kHz sine wave is sampled at 12 kHz without an anti-…
Questions that mention Nyquist frequency (3)
- What sampling frequency is needed to sample an analog signal containing components up to 20 kHz without aliasing?
- What type of filter is used as the anti-aliasing filter placed before an AD converter?
- If a 10 kHz sine wave is sampled at 12 kHz without an anti-aliasing filter, at what frequency does it appear?
Related terms
Aliasing Sampling theorem Correlated double sampling (CDS) Delta-sigma ADC DNL (differential nonlinearity) ENOB (effective number of bits) Flash ADC INL (integral nonlinearity) Jitter Missing code