A High-Performance Mash Fourth-order Sigma-delta Modulator

被引：0
|
作者：
Liu Wenyan [1 ]
Zhang Bin [1 ]
Chen Long [1 ]
Gao Chao [1 ]
Liu Xiaowei [1 ]
机构：
[1] Harbin Inst Technol, MEMS Ctr, Harbin 150006, Heilongjiang, Peoples R China
来源：
MICRO-NANO TECHNOLOGY XIII | 2012年 / 503卷
关键词：
Modulator; Mash; Quantization noise; Sigma-delta; System;
D O I：
10.4028/www.scientific.net/KEM.503.207
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper reports on a system level design and analysis of a mash fourth-order sigma-delta (Sigma Delta) modulator. Compared with a high-order single-loop Sigma Delta modulator (Sigma Delta M), there's no need to consider about the system stability of a mash Sigma Delta M, which has the advantages of better signal to quantization noise ratio (SQNR). System level simulation results indicate that the SQNR is 122.0 dB, and the effective number of bits (ENOB) is 19.97 bits when the over sampling ratio (OSR) is 128.
引用
收藏
页码：207 / 210
页数：4
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