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Design >> Analog Design >> Qustions about Allen’s Book
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Message started by qiushidaren on Jan 12^th, 2007, 2:17am

Title: Qustions about Allen’s Book
Post by qiushidaren on Jan 12^th, 2007, 2:17am

Hi all, I have been reading P. E. Allen’s famous book <<CMOS Analog Circuit Design>> for 2 months, but I find some questions there, can anyone help me?

In page 403, there is a line “However, the 1/f noise is aliased around clock frequencies…,” cuz I am not a native speaker so I don’t know what does it mean here.
In page 408, the first paragraph, there is a √2.548x10^-17, but I can’t find this quantity in previous context, I don’t know where does it come from.

Thank you in advance.

Best regards,
Terry

Title: Re: Qustions about Allen’s Book
Post by Croaker on Jan 12^th, 2007, 8:46am

When a signal is sampled, the frequency spectrum is replicated at multiples of the sampling frequency.