High Speed Digital ELD Compensation with Hybrid Thermometer Coding in CT ΔΣ Modulators

被引：0
|
作者：
Hu, Hang [1 ]
Feng, Zemin [1 ]
Chen, Chixiao [1 ]
Ye, Fan [1 ]
Ren, Junyan [1 ]
机构：
[1] Fudan Univ, State Key Lab ASIC & Syst, Shanghai, Peoples R China
来源：
2017 IEEE 60TH INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS (MWSCAS) | 2017年
关键词：
excess loop delay; digital compensation; 3-0 MASH delta-sigma modulator;
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：
In this paper, a high speed digital excess loop delay (ELD) compensation scheme with hybrid thermometer coding is proposed. In this high speed compensation, the time constraint of the DAC feedback route is shifted to the one clock compensation path. Also, the method to deal with the signal overflows the quantizer's range is analyzed. Compared to other digital ELD compensations, this scheme features an efficient compensation with a low hardware cost and a high operation frequency. The digital ELD compensation scheme and the algorithm were verified in a design of 3-0 MASH delta-sigma modulator in TSMC 65nm LP CMOS process.
引用
收藏
页码：1009 / 1012
页数：4
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