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JSSC 2010第2期Other0.13μm

Attenuation-Predistortion Linearization of CMOS OTAs With Digital Correction of

提出一种基于衰减预失真线性化技术的CMOS OTA设计,通过数字校正实现高频线性度提升
350MHz带宽下IM3<-74dB, 70dB SNR@1MHz, 5.2mW功耗
衰减预失真线性化跨导放大器Volterra级数谐波抵消可编程电阻
采用匹配OTA对实现谐波抵消的鲁棒架构
基于Volterra级数分析的工艺变化补偿方案
可编程电阻延迟均衡技术抑制频率相关失真
Abstract
Mohamed Mobarak, Student Member , IEEE , Marvin Onabajo , Student Member , IEEE , Jose Silva-Martinez, Fellow, IEEE, and Edgar Sánchez-Sinencio , Fellow, IEEE Abstract—An architectural attenuation-predistortion lineariza- tion scheme for a wide range of operational transconductance amplifiers (OTAs) is proposed and demonstrated with a transcon- ductance-capacitor /40G/109-C/41filter. The linearization technique utilizes two matched OTAs to cancel output harmonics, creating a robust architecture. C