fanisani
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I want to know the relation of spur and non-linearity in ADC and
what is the difference between harmonic and spur?
in ADC because of non-linearity, input driving and s\h circuit
at output we see that harmonics of input signal appear at ADC
spectrum.
The ideal ADC has the quantization noise as a white noise (in certain condition, and
i think it appear because of non-linearity of transfer function of ADC)but if the input
is a pure single tone it has no spur in the spectrum . so i think about INL and DNL
error and how can they cause spur in the spectrum in low frequency.
but in calculation of SFDR we must think of worst spur.references say that spur can
be harmonic of input signal or may be distortion.
at level of signal near full scale worst spur be a harmonic , but at low level signal
may be not a An ideal N-bit ADC, sampling at a rate fs, produces quantization
noise having an rms value of q/(sqrt 12) measured in the Nyquist bandwidth dc to
fs/2.
An actual ADC will produce noise in excess of the theoretical
quantization noise, as well as distortion products caused by a non-linear transfer
function. but i think quantization noise is also because of non-linearity.????????????
what is the difference between harmonic and spur?
in ADC because of non-linearity, input driving and s\h circuit
at output we see that harmonics of input signal appear at ADC
spectrum.
The ideal ADC has the quantization noise as a white noise (in certain condition, and
i think it appear because of non-linearity of transfer function of ADC)but if the input
is a pure single tone it has no spur in the spectrum . so i think about INL and DNL
error and how can they cause spur in the spectrum in low frequency.
but in calculation of SFDR we must think of worst spur.references say that spur can
be harmonic of input signal or may be distortion.
at level of signal near full scale worst spur be a harmonic , but at low level signal
may be not a An ideal N-bit ADC, sampling at a rate fs, produces quantization
noise having an rms value of q/(sqrt 12) measured in the Nyquist bandwidth dc to
fs/2.
An actual ADC will produce noise in excess of the theoretical
quantization noise, as well as distortion products caused by a non-linear transfer
function. but i think quantization noise is also because of non-linearity.????????????