Architectural Design and Simulation of A Fourth-Order Sigma-Delta Modulator

被引：0
|
作者：
Fan Wenjie [1 ]
Lv Qiuye [1 ]
He Chong [1 ]
Yin Liang [1 ]
Liu Xiaowei [1 ]
机构：
[1] Harbin Inst Technol, MEMS Ctr, Harbin, Heilongjiang, Peoples R China
来源：
MICRO-NANO TECHNOLOGY XV | 2014年 / 609-610卷
关键词：
Sigma-delta modulator; oversampling; noise shaping; architectural design; input feed-forward architecture;
D O I：
10.4028/www.scientific.net/KEM.609-610.723
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Sigma-delta ADC outperforms the Nyquist ADC in precision and robustness by using oversampling and noise shaping. A fourth-order sigma-delta modulator of input feedforward architecture is designed and simulated in system-level. Input feedforward architecture has advantages of low output swing of integrators and simple structure. Proper circuit parameters are also presented in this paper. The simulation revealed that the modulator achieves 109 dB dynamic range in a signal bandwidth of 1 KHz with a sampling frequency of 250 KHz.
引用
收藏
页码：723 / 727
页数：5
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