SNR of quantizer

Discussion in 'Analog & Mixed-Signal Design' started by Aljaž Krašna, Nov 2, 2017.

  1. Aljaž Krašna

    Thread Starter New Member

    May 8, 2016
    I am interested in drawing the spectrum of signal after passing the quantizer.

    My system consist of:

    sine wave source --> sampler --> sample and hold --> quantizer.

    I know that quantizer add noise to original signal. The equation to determine SNR is
    SNR = 6.02*N + 4.77+ 20*log10(LF)+ 10*log10(OSR), LF is loading factor and OSR is over sampling ratio factor.

    My question is in which band of frequencies this SNR is valid. Is this valid only in -Fs/2 .... Fs/2.

    Thank you!
  2. moffy

    New Member

    Nov 13, 2017
    Sorry, but I don't understand why you have a sampler followed by a sample & hold, aren't they just one thing?