alireza
Junior Member
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Posts: 21
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Hi,
In Fig 17 of the paper: "Device noise simulation of DS Modulators", simulation results of the input referred noise PSD of a discrete-time integrator is plotted. The plot shows that at relatively high frequencies (close to fs/2), the noise floor starts to rise significantly. In the paper, it is mentioned that this is due to the small integrator gain near fs/2. However, this is not clear to me. The reason is I think the integrator gain should only affect the output noise spectrum, not the input-referred spectrum. (The input-referred spectrum should not depend on the transfer function H(z).) On the other hand, I thought the input PSD should be white at medium to high frequencies.
Any feedback or comments are very much appreciated.
Thank you,
Alireza
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