设计Sigma-Delta A/D调制器结构Design the Architecture of Sigma-Delta A/D Modulator
冯军,赵建明,肖宁
摘要(Abstract):
介绍Sigma Delta调制的基本原理。重点根据不同调制器结构的特性和产品的总体性能要求设计合适的调制器结构,实现其具体的电路总体结构,分析该电路结构特性对电路模块设计的影响,给出电路模块的设计原则和指标。芯片已在中芯国际0.18μm工艺线上流片成功,工作频率6.144 MHz,动态范围90 dB,信噪比88 dB,功耗9.4 mW,总谐波失真0.024 8%。
关键词(KeyWords): Sigma-Delta调制;过采样;噪声整形;设计指标
基金项目(Foundation):
作者(Author): 冯军,赵建明,肖宁
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