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CMOS First-Order All-Pass Filter With 2-Hz Pole Frequency

机译:具有2Hz极点频率的CMOS一阶全通滤波器

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A CMOS fully integrated all-pass filter with an extremely low pole frequency of 2 Hz is introduced in this paper. It has 0.08-dB passband ripple and 0.029-mm(2) Si area. It has 0.38-mW power consumption in strong inversion with +/- 0.6-V power supplies. In subthreshold, it has 0.64-mu W quiescent power and operates with +/- 200-mV dc supplies. Miller multiplication is used to obtain a large equivalent capacitor without excessive Si area. By varying the gain of the Miller amplifier, the pole frequency can be varied from 2 to 48 Hz. Experimental and simulation results of a test chip prototype in 130-nm CMOS technology validate the proposed circuit.
机译:本文介绍了一个极低的2 Hz极点频率的CMOS完全集成全通滤波器。它具有0.08 dB的通带纹波和0.029 mm(2)的Si面积。采用+/- 0.6V电源时,强大的反向功耗仅为0.38mW。在亚阈值以下,它具有0.64μW的静态功率,并使用+/- 200mV直流电源工作。使用米勒乘法来获得较大的等效电容器,而不会占用过多的硅面积。通过改变米勒放大器的增益,极点频率可以在2到48 Hz之间变化。 130 nm CMOS技术的测试芯片原型的实验和仿真结果验证了该电路的有效性。

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