Abstract : the paper proposes a mathematical model of a / d converter with quantizing error , nonlinearity and differential nonlinearity errors for computer simulation , and based on the model , the errors caused by voltage change , current change and phase change in the power measurement are analyzed by computer simulation for both the asynchronous and quasi - synchronous sampling algorithms 文摘:本文提出了具有量化误差、非线性误差和微分非线性误差的a / d转换器的数学模型,在该数学模型的基础上,仿真分析了非同步采样法、准同步采样递推算法各种情况下的误差,包括功率测量中电压线性、电流线性、相位变化误差及电压测量的误差。
The simulation results in this thesis indicate that , its settling - time to full swing is 15ns with 3v supply , the total static power dissipation is less than 50mw , the differential nonlinearity error is 0 . 58lsb , the integral nonlinearity error is 0 . 54 lsb , spurious free dynamic range is more than 60db , and the output current can be adjusted 本课题设计的数模转换器性能指标为:工作电压3v ,建立时间15ns ,微分非线性误差0 . 58lsb ,积分非线性误差0 . 54lsb , sfdr高于60db ,总功耗不到50mw ,输出电流可调。设计成果可应用于数据处理和控制系统电路中,具有一定的先进性和实用价值。
Differential nonlinearity (acronym DNL) is a term describing the deviation between two analog values corresponding to adjacent input digital values. It is an important specification for measuring error in a digital-to-analog converter (DAC); the accuracy of a DAC is mainly determined by this specification.