A High-Precision Audio Σ-Δ D/A Converter

被引：0
|
作者：
Bai, Tao [1 ]
Xie, Long [1 ]
Li, Zhen [1 ]
Yang, Jiang [1 ]
Chen, Zhijie [1 ]
Wan, Peiyuan [1 ]
机构：
[1] Beijing Univ Technol, Fac Informat Technol, Beijing Embedded Syst Key Lab, Beijing, Peoples R China
来源：
2020 IEEE 14TH INTERNATIONAL CONFERENCE ON ANTI-COUNTERFEITING, SECURITY, AND IDENTIFICATION (ASID) | 2020年
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Sigma-Delta DAC; Oversampling; Noise shaping;
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
Design of a digital front-end module of Sigma-Delta audio DAC is proposed in this paper, in order to meet the requirements of modern portable audio equipment with high sound quality, miniaturization and low power consumption. Two half-band filter and one CIC filter are used to design the interpolation filter with 128 times oversampling. The sigma-delta modulator selects the 3rd order 1bit quantization structure, and the system simulation is carried out under Matlab. The SNR of the whole DAC is 108 dB. Through FPGA verification, the test results show that the scheme is feasible.
引用
收藏
页码：120 / 123
页数：4
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