
Demystifying Switched-Capacitor Circuits
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portion of the noise power is included within the signal bandwidth and counted in
the calculation of SNR (for the moment we assume that the quantization noise is the
dominant source of noise in the system; hence, we may use the term SNR in place of
SQNR). Or, oversampling can be considered equivalent to stretching the quantization
noise power across the frequency spectrum (given a fi xed signal bandwidth f
0
),
thereby reducing the noise power in the signal band.
Since the noise power is assumed to be constant across the frequency spectrum
(i.e., like a white noise), we can write the aforementioned sma ...