A low-power inverter-based Σ△ analog-to-digital converter for audio applications  

作　　者：LIU XiaoPeng HAN Yan HAN XiaoXia LUO Hao Ray C C CHEUNG CAO TianLin 

机构地区：[1]Institute of Microelectronics & Photoelectronics, Zhejiang University [2]Department of Electronic Engineering, City University of Hong Kong

出　　处：《Science China(Information Sciences)》2014年第4期214-223,共10页中国科学（信息科学）（英文版）

基　　金：supported by a grant from the National Natural Science Foundation of China(General Pro-gram Grant No.61274035);Ph.D.Programs Foundation of the Ministry of Education of China(Grant No.20100101110063)

摘　　要：This paper presents a design for a low-power, high-resolution audio ∑△ analog-to-digital converter （ADC） based on a novel gain-boost class-C inverter. The gain-boost class-C inverter behaves as a sub-threshold amplifier, thereby minimizing power dissipation. The proposed ADC chip is fabricated in a SMIC 65-nm CMOS process with a die area of 0.63 mm2. With 1.2 V of supply voltage, the ADC chip achieves a peak signal-to- noise-plus-distortion-ratio （SNDR） of 92 dB and a dynamic range （DR） of 97 dB over the 20 kHz audio band, consuming only 1.13 roW. These results make the ADC particularly suitable for portable electronics applications.This paper presents a design for a low-power, high-resolution audio ∑△ analog-to-digital converter （ADC） based on a novel gain-boost class-C inverter. The gain-boost class-C inverter behaves as a sub-threshold amplifier, thereby minimizing power dissipation. The proposed ADC chip is fabricated in a SMIC 65-nm CMOS process with a die area of 0.63 mm2. With 1.2 V of supply voltage, the ADC chip achieves a peak signal-to- noise-plus-distortion-ratio （SNDR） of 92 dB and a dynamic range （DR） of 97 dB over the 20 kHz audio band, consuming only 1.13 roW. These results make the ADC particularly suitable for portable electronics applications.

关 键 词：∑△ ADC class-C inverter LOW-POWER HIGH-RESOLUTION GAIN-BOOST 

分 类 号：TN792[电子电信—电路与系统]