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中文摘要：
提出了一种应用于开关电流A/D转换器的∑△调制器的行为仿真与设计参数优化方法。通过计算晶体管模型参数与误差的关系对电路的非理想特性如：电荷注入误差、输入输出电导比误差、设置误差噪声误差等进行了SIMULINK行为建模。采用S函数完成SI离散系统的参数传递及计算。从仿真结果中对电路的结构设计、谐波失真以及CMOS器件参数的选择进行分析优化，快速综合出设计所需的器件参数。模型具有精度高、仿真时间短等优点。
英文摘要：
The design and simulation procedure of a low-pass sigma-delta modulator for Analogue to Digital conversion was discussed. The circuit non-idealities of the modulator such as charge injection errors, conductance ratio error, settling error and kT/C noise were modeled behaviorally using SIMULINK based on the relationship between error and parameters of MOS FET. The S-function was introduced to transfer and calculated the parameters of SI discrete system. The required circuit specifications were extracted from the behavioral simulation results. The combination of high accuracy, short CPU time makes the proposed tool an advantageous alternative for Switched-Current synthesis.
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