Distortion modeling of active-RC lossy integrator by Volterra series method

Y. Miao, Yuxing Zhang
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Abstract

In this paper, the distortion of an active-RC lossy integrator is modeled by using Volterra series method. The opamp used in the integrator is divided into different nonlinear stages and their nonlinear coefficients are obtained easily by calculating the Volterra kernel of corresponding stage. The rules of cascade connection and feedback in Volterra method are employed to derive the distortion factors. The results obtained in the paper are suitable to investigate the distortion behaviors of the active-RC lossy integrator quickly. The accuracy of this modeling was verified by comparing the theoretical results with transistor level simulation.
基于Volterra级数法的有源rc有损积分器畸变建模
本文采用Volterra级数法对有源rc有损积分器的畸变进行了建模。该积分器中使用的运放大器被划分为不同的非线性级,通过计算相应级的Volterra核,可以方便地获得其非线性系数。利用Volterra法中的串级连接和反馈规则推导出畸变因子。所得结果适用于快速研究有源rc有损积分器的畸变行为。通过与晶体管级仿真结果的比较,验证了该模型的准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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