A 1-V 60-μW 85-dB dynamic range continuous-time third-order sigma-delta modulator  

作　　者：李渊文 齐达 董一枫 许俊 任俊彦 

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

出　　处：《Journal of Semiconductors》2009年第12期118-122,共5页半导体学报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(No.2008AA010702)

摘　　要：A 1-V third order one-bit continuous-time（CT） EA modulator is presented. Designed in the SMIC mixedsignal 0.13-μm CMOS process, the modulator utilizes active RC integrators to implement the loop filter. An efficient circuit design methodology for the CT ZA modulator is proposed and verified. Low power dissipation is achieved through the use of two-stage class A/AB amplifiers. The presented modulator achieves 81.4-dB SNDR and 85-dB dynamic range in a 20-kHz bandwidth with an over sampling ratio of 128. The total power consumption of the modulator is only 60 μW from a 1-V power supply and the prototype occupies an active area of 0.12 mm^2.A 1-V third order one-bit continuous-time（CT） EA modulator is presented. Designed in the SMIC mixedsignal 0.13-μm CMOS process, the modulator utilizes active RC integrators to implement the loop filter. An efficient circuit design methodology for the CT ZA modulator is proposed and verified. Low power dissipation is achieved through the use of two-stage class A/AB amplifiers. The presented modulator achieves 81.4-dB SNDR and 85-dB dynamic range in a 20-kHz bandwidth with an over sampling ratio of 128. The total power consumption of the modulator is only 60 μW from a 1-V power supply and the prototype occupies an active area of 0.12 mm^2.

关 键 词：analog-to-digital converter continuous-time filter LOW-POWER LOW-VOLTAGE sigma-delta modulation 

分 类 号：TN761[电子电信—电路与系统]