针对数字音频领域16 bit精度、20 kHz带宽的设计要求，以0．18 Ixm CMOS工艺设计二阶单环的一位sigma．delta调制器，-16 bit digital audio field for accuracy, 20 kHz bandwidth design requirements to 0.18 Ixm CMOS process design, a second-order single-loop sigma. delta modulator,

simulink模拟的二阶sigma delta调制器 可以提高传输速率 中间用到了半带滤波器和FIR滤波器CIC滤波器 进行过采样-Simulink simulation of second order sigma delta modulator can improve the transmission rate use among the half took filter and FIR filter CIC filter sample