A fourth-order bandwidth-reconfigurable delta-sigma modulator for audio applications  

作　　者：王俊乾 杨海峰 魏蕊 许俊 任俊彦 

机构地区：[1]State Key Laboratory of ASIC&System,Fudan University [2]Microelectronics Science and Technology Innovation Platform,Fudan University

出　　处：《Journal of Semiconductors》2012年第7期74-79,共6页半导体学报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(No.2008AA0 10702);the National Science & Technology Major Projects,China(No.2009ZX03007-002-02)

摘　　要：A single loop fourth-order delta-sigma modulator is presented for audio applications. A reconfigurable mechanism is adopted for two bandwidth-based modes （8 kHz/16 kHz）. Manufactured in the SM1C 0.13μm CMOS mixed signal process, the chip consumes low power （153.6 μW） and occupies a core area of 0.98×0.46 mm2. The presented modulator achieves an 89.3 dB SNR and 90.2 dB dynamic range in 16 kHz mode, as well as a 90.2 dB SNR and 86 dB dynamic range in 8 kHz mode. The designed modulator shows a very competitive figure of merit among state-of-the-art low voltage modulators.A single loop fourth-order delta-sigma modulator is presented for audio applications. A reconfigurable mechanism is adopted for two bandwidth-based modes （8 kHz/16 kHz）. Manufactured in the SM1C 0.13μm CMOS mixed signal process, the chip consumes low power （153.6 μW） and occupies a core area of 0.98×0.46 mm2. The presented modulator achieves an 89.3 dB SNR and 90.2 dB dynamic range in 16 kHz mode, as well as a 90.2 dB SNR and 86 dB dynamic range in 8 kHz mode. The designed modulator shows a very competitive figure of merit among state-of-the-art low voltage modulators.

关 键 词：delta-sigma modulator feedforward architecture RECONFIGURATION switched capacitor bootstrappedswitch 

分 类 号：TN761[电子电信—电路与系统]