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Design >> Mixed-Signal Design >> one question about the PSD of sampled noise
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Message started by qilongliu on Jun 14^th, 2013, 11:06am

Title: one question about the PSD of sampled noise
Post by qilongliu on Jun 14^th, 2013, 11:06am

Hi guys,
Recently I have a doubt about one expression in one document in Analysis Column, named by "Simulating Switched-Capacitor Filters with SpectreRF". There is some difficultly in understanding it.
On Page 6, there is a formula without any derivation (Expr. 6). Conventionally when we analysis the noise we treat it as continuous time random signal. But here Dr. Kun took it as discrete-time case. As far as I know, that the definition of PSD in continuous time domain is quite different from that in discrete time domain. So how to bridge the gap between DTFT and continuous-time FT? Thank you all guys.

B.R
Q.L