微电子学与计算机
微電子學與計算機
미전자학여계산궤
MICROELECTRONICS & COMPUTER
2008年
4期
143-146,151
,共5页
雷鑑铭%代小伍%邹雪城%邹志革
雷鑑銘%代小伍%鄒雪城%鄒誌革
뢰감명%대소오%추설성%추지혁
Delta Sigma调制器%非线性直流增益%色化噪声
Delta Sigma調製器%非線性直流增益%色化譟聲
Delta Sigma조제기%비선성직류증익%색화조성
delta sigma modulators%nonlinear DC gain%colored noise
系统构建并研究了开关电容积分器Delta Sigma调制器非理想因素行为级模型.重点实现一种运放非线性直流增益模型,仿真表明它更有效反映奇次谐波失真,为保证模型真实性,综合考虑调制器其他非理想因素,如时钟抖动、量化器失配、采样噪声、开关非线性电阻以及运放参数(色化噪声、饱和电压、增益带宽、摆率等).
繫統構建併研究瞭開關電容積分器Delta Sigma調製器非理想因素行為級模型.重點實現一種運放非線性直流增益模型,倣真錶明它更有效反映奇次諧波失真,為保證模型真實性,綜閤攷慮調製器其他非理想因素,如時鐘抖動、量化器失配、採樣譟聲、開關非線性電阻以及運放參數(色化譟聲、飽和電壓、增益帶寬、襬率等).
계통구건병연구료개관전용적분기Delta Sigma조제기비이상인소행위급모형.중점실현일충운방비선성직류증익모형,방진표명타경유효반영기차해파실진,위보증모형진실성,종합고필조제기기타비이상인소,여시종두동、양화기실배、채양조성、개관비선성전조이급운방삼수(색화조성、포화전압、증익대관、파솔등).
Non-ideal behavior models of switched capacitor delta sigma modulators are presented.The operational amplifier nonlinear DC gain is modeled with emphasis and simulation results show it introduces odd harmonic distortion.Other modulator non-idealities such as clock jitter,sampling noise,quantizer capacitor misamatch,nonlinear switch on-resistance and operational amplifier parameters(colored noise,GBW,SR,saturation voltage and SO on)ale also included.
