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,bu...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.展开更多
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
文摘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.
