What is Oversampling?
Sampling at a rate well above what the signal requires (twice its bandwidth). It spreads quantization noise over a wider band and reduces noise in the signal band; it is the basis of delta-sigma ADCs.
Field: AD/DA conversion
Oversampling in the explanations
Plain oversampling is therefore inefficient: one extra bit needs 4× the rate, and two bits need 16×.
With simple oversampling and no noise shaping, how much doe…ADCs are classed as Nyquist-rate converters, which sample at about twice the signal bandwidth (flash, SAR, pipelined, etc.), and oversampling converters, which sample far faster.
Which AD converter architecture is classified as oversampli…Integration is used by dual-slope converters, and oversampling by ΔΣ converters.
Which correctly describes the operation of a successive-app…
Questions that mention Oversampling (5)
- With simple oversampling and no noise shaping, how much does quantization noise improve when the sampling frequency is quadrupled?
- Which AD converter architecture is classified as oversampling?
- Which correctly describes the operation of a successive-approximation (SAR) AD converter?
- Which is a characteristic of a delta-sigma (ΔΣ) AD converter?
- What is the effect of raising the order of the modulator in a ΔΣ AD converter (for example, from first to second order)?
Related terms
Noise shaping Comparator Microcontroller Yield Aliasing Delta-sigma ADC DNL (differential nonlinearity) ENOB (effective number of bits) Flash ADC INL (integral nonlinearity)