一种高精度单环高阶Σ-Δ调制器

发布时间：2018-04-10 05:22

本文选题：Σ-Δ调制器　切入点：高精度　出处：《微电子学》2017年05期

【摘要】：设计了一种高精度单环3阶Σ-Δ调制器。阐述了Σ-Δ调制器的结构,确定了前馈因子和增益因子等重要参数。对调制器的各种非理想因素,如时钟抖动、开关非线性、采样电容kT/C噪声等,进行了量化分析和行为级建模。采用MATLAB工具进行了系统验证。验证结果表明,调制器的采样频率为100kHz,信噪比为99dB,信噪比最大值为104.2dB,有效精度达16位。
[Abstract]:A high precision single loop 3 order 危-螖 modulator is designed.The structure of 危-螖 modulator is described, and some important parameters, such as feedforward factor and gain factor, are determined.Various non-ideal factors of modulator, such as clock jitter, switching nonlinearity, sampling capacitance kT/C noise and so on, are analyzed quantitatively and modeled at behavior level.The system is verified by MATLAB tool.The results show that the sampling frequency of the modulator is 100kHz, the signal-to-noise ratio (SNR) is 99dB, the maximum SNR is 104.2dB, and the effective precision is 16 bits.
【作者单位】：中国电子科技集团公司第五十八研究所;江南大学物联网工程学院;
【分类号】：TN761

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