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首页> 外文期刊>IEEE Transactions on Circuits and Systems. I, Regular Papers >Modeling of Glitches due to Rise/Fall Asymmetry in Current-Steering Digital-to-Analog Converters
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Modeling of Glitches due to Rise/Fall Asymmetry in Current-Steering Digital-to-Analog Converters

机译:电流导向数模转换器中由于上升/下降不对称引起的毛刺建模

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摘要

The current-steering digital-to-analog converter (DAC) is the most common type of DAC for high-speed applications. Glitches present in the DAC output contribute to nonlinear distortion in the DAC transfer characteristics degrading the circuit performance. One source of glitches is asymmetry in the settling behavior when switching on and off a current source. A behavioral-level model of this nonideal behavior is derived in this work. Further, a method with low computational complexity for estimating the influence of the modeled errors in the frequency domain is developed. This method can be utilized by circuit designers to derive circuit requirements for fulfilling a given frequency-domain specification, potentially relaxing the requirements compared with a worst-case analysis. Examples of model utilization are given in terms of an analytical examination and MATLAB simulations. A good agreement between simulated and analytical results is obtained.
机译:电流控制型数模转换器(DAC)是高速应用中最常见的DAC类型。 DAC输出中存在的毛刺会导致DAC传输特性中的非线性失真,从而降低电路性能。毛刺的一种来源是在接通和关断电流源时的建立行为中的不对称性。在这项工作中,得出了这种非理想行为的行为水平模型。另外,开发了一种计算复杂度低的方法,用于估计建模误差在频域中的影响。电路设计人员可以利用此方法得出满足给定频域规范的电路要求,与最坏情况分析相比,可能会放宽要求。通过分析检查和MATLAB仿真给出了模型利用的示例。模拟结果和分析结果之间取得了良好的一致性。

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