 Then you see a schematic like following. This is a model to simulate an over sampling filter with quantization.
Do left click to select SIGGEN (U_14) and right click to choose "Open
a Monitor".
This is a 500Hz sine wave and the sampling frequency is 22050Hz.
Next, open a monitor for FFTMON (U_7) to see its spectrum.
Since it's a digital signal, the spectrum is symmetry with respect to its
Nyquist frequency. The floor noise is less than -120dB below the peaks.
SNR (Signal to Noise Ratio) is 120dB.
|