A 65-nm low-noise low-costΣ△modulator for audio applications  

作　　者：Liang Guo Liao Lu Luo Hao Liu Xiaopeng Han Xiaoxia Han Yan 梁国;廖璐;罗豪;刘晓鹏;韩晓霞;韩雁(Institute of Microelectronics&Photoelectronics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]Institute of Microelectronics&Photoelectronics,Zhejiang University,Hangzhou 310027,China

出　　处：《Journal of Semiconductors》2012年第2期82-86,共5页半导体学报（英文版）

基　　金：supported by the PhD Programs Foundation of Ministry of Education of China(No.20100101110063);the Incubation Programs of Innovation & Carve out of Zhejiang Province,China

摘　　要：This paper introduces a low-noise low-costΣA modulator for digital audio analog-to-digital conversion. By adopting a low-noise large-output swing operation amplifier,not only is the flicker noise greatly inhibited,but also the power consumption is reduced.Also the area cost is relatively small.The modulator was implemented in a SMIC standard 65-nm CMOS process.Measurement results show it can achieve 96 dB peak signal-to-noise plus distortion ratio（SNDR） and 105 dB dynamic range（DR） over the 22.05-kHz audio band and occupies 0.16 mm^2. The power consumption of the proposed modulator is 4.9 mW from a 2.5 V power supply,which is suitable for high-performance,low-cost audio codec applications.This paper introduces a low-noise low-costΣA modulator for digital audio analog-to-digital conversion. By adopting a low-noise large-output swing operation amplifier,not only is the flicker noise greatly inhibited,but also the power consumption is reduced.Also the area cost is relatively small.The modulator was implemented in a SMIC standard 65-nm CMOS process.Measurement results show it can achieve 96 dB peak signal-to-noise plus distortion ratio（SNDR） and 105 dB dynamic range（DR） over the 22.05-kHz audio band and occupies 0.16 mm^2. The power consumption of the proposed modulator is 4.9 mW from a 2.5 V power supply,which is suitable for high-performance,low-cost audio codec applications.

关 键 词：Σ△modulator LOW-NOISE LOW-COST analog-to-digital converter 

分 类 号：TN761[电子电信—电路与系统]