Study of Quantizer-Bandwidth in Continuous-Time Delta-Sigma Modulators

被引：0
|
作者：
Han, Changsok [1 ]
Kim, Taewook [1 ]
Xu, Xiaodong [1 ]
Maghari, Nima [1 ]
机构：
[1] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA
来源：
2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS) | 2019年
关键词：
EXCESS LOOP DELAY;
D O I：
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：
The effect of finite bandwidth of quantizers in continuous-time (CT) delta-sigma modulators (DSMs) is studied. It is shown that the finite quantizer-bandwidth in CTDSMs degrades the performance much more severely than it does in their discrete-time counterparts. It is demonstrated that CTDSMs with excess loop delay (ELD) compensation schemes require an even higher quantizer-bandwidth compared to ELD-free CTDSMs. Furthermore, it is shown that the required quantizer-bandwidth increases as the order and the out-of-band gain increases. Detailed mathematical analyses and simulation results are provided to show the effect of the finite quantizer-bandwidth.
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页数：5
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