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Design >> Analog Design >> Quantization noise spectrum
https://designers-guide.org/forum/YaBB.pl?num=1337140970

Message started by adesign on May 15^th, 2012, 9:02pm

Title: Quantization noise spectrum
Post by adesign on May 15^th, 2012, 9:02pm

Hi,

In any Nyquist ADC, the quantization noise power is given by V_LSB²/12 which is spread across -fs/2 to fs/2.

Could anyone comment on - "why it is limited from -fs/2 to fs/2"?

Thanks,
ADesign

Title: Re: Quantization noise spectrum
Post by ywguo on May 16^th, 2012, 2:28am

Because it is discrete output with sampling clock Fs.

Yawei

Title: Re: Quantization noise spectrum
Post by adesign on May 16^th, 2012, 4:12am

Thanks Yawei

Title: Re: Quantization noise spectrum
Post by raja.cedt on May 16^th, 2012, 6:56am

hello,
When you a sample a signal with Fs sampling rate, frequency components above fs will be fold back into fs. Any real signal is symmetric around fs/2.

Thanks,
Raj.