A 100-MHz bandpass sigma-delta modulator with a 75-dB dynamic range for IF receivers  

作　　者：袁宇丹 李立 常虹 郭亚炜 程旭 曾晓洋 

机构地区：[1]State Key Laboratory of ASIC&System,Fudan University

出　　处：《Journal of Semiconductors》2011年第2期73-78,共6页半导体学报（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China(No.2009AA011600);the Young Scientists Fund of Fudan University,China(No.09FQ33);the State Key Laboratory ASIC & System of Fudan University,China(No. 09MS008)

摘　　要：A fourth-order switched-capacitor bandpass ∑△ modulator is presented for digital intermediatefrequency （IF） receivers. The circuit operates at a sampling frequency of 100 MHz. The transfer function of the resonator considering nonidealities of the operational amplifier is proposed so as to optimize the performance of resonators. The modulator is implemented in a 0.13-μm standard CMOS process. The measurement shows that the signal-to-noise-and-distortion ratio and dynamic range achieve 68 dB and 75 dB, respectively, over a bandwidth of 200 kHz centered at 25 MHz, and the power dissipation is 8.2 mW at a 1.2 V supply.A fourth-order switched-capacitor bandpass ∑△ modulator is presented for digital intermediatefrequency （IF） receivers. The circuit operates at a sampling frequency of 100 MHz. The transfer function of the resonator considering nonidealities of the operational amplifier is proposed so as to optimize the performance of resonators. The modulator is implemented in a 0.13-μm standard CMOS process. The measurement shows that the signal-to-noise-and-distortion ratio and dynamic range achieve 68 dB and 75 dB, respectively, over a bandwidth of 200 kHz centered at 25 MHz, and the power dissipation is 8.2 mW at a 1.2 V supply.

关 键 词：analog-to-digital converter bandpass sigma-delta modulator RESONATOR IF receiver 

分 类 号：TN858[电子电信—信息与通信工程]