Systematic design of double-sampling ΣΔ ADC'S with modified NTF

被引:0
|
作者
Rombouts, R [1 ]
De Maeyer, J [1 ]
Raman, J [1 ]
Weyten, L [1 ]
机构
[1] State Univ Ghent, B-9000 Ghent, Belgium
关键词
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暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A disadvantage of double-sampling SigmaDelta ADC's is their sensitivity to path mismatch. Recently, an approach to solve this problem was presented. It consists of modifying the noise transfer function (NTF) of the modulator such that it has a zero at the Nyquist frequency, next to those in the baseband. Unfortunately, no systematic design strategy for such ADC's is available. In this work, we present such a strategy. It consists of finding optimal pole positions for the modified NTF. This can be combined with optimizing the zeros of the NTR Next, we introduce a novel efficient structure that has enough flexibility to realize the optimized pole positions.
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页码:401 / 404
页数:4
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