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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> SDM: Quantization noise increase near edge of input range https://designers-guide.org/forum/YaBB.pl?num=1507612096 Message started by neoflash on Oct 9th, 2017, 10:08pm |
Title: SDM: Quantization noise increase near edge of input range Post by neoflash on Oct 9th, 2017, 10:08pm I am wondering why quantization noise will increase when input is near the edge of the full range? Is that because in that case the noise is not random enough to be effectively filtered? Does all SDM suffer this issue? |
Title: Re: SDM: Quantization noise increase near edge of input range Post by Frank_Heart on Nov 17th, 2017, 10:40am Hi, Neo, One clue in my mind is the quantifier effective gain becomes smaller when input approaches its MAX, which degrades the loop gain and increase the Q noise. This might apply to all SDM. -Frank |
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