The in-phase integrator and reverse-phase integrator which are both not sensitive to parasitic capacitor are chosen in the filter design. The CMOS two-stage operational amplifier which has the high DC gain and unity gain bandwidth is used to form the integrator.
设计中采用了对寄生电容不敏感的反相积分器和同相积分器,积分器中的运算放大器选择具有较高直流开环增益和较大单位增益带宽的CMOS两级运放。
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