用于超低截止频率滤波器的电压模式接地电容乘法器，具有广泛的可调增益。

IF 2.6 4区综合性期刊 Q2 MULTIDISCIPLINARY SCIENCES

Science Progress Pub Date : 2024-10-01 DOI:10.1177/00368504241276765

Yan Li

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引用次数: 0

摘要

通过电路模型设计了一种用于超低频生理信号处理的电压模式电容乘法器。使用所提出的乘法器，滤波器的基本电容为 1 pF，电阻为 10 kΩ 时，截止频率可达 12 mHz。相应的乘法系数为 1.35 × 109。通过改变控制端，乘法系数可从 1950 调整到 1.35 × 109，相应的滤波器截止频率将从 12 mHz 调整到 8.15 kHz。根据电路模型，要进一步提高倍增系数以减小芯片面积，可以在反馈回路中增加更多的倍增级。

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A voltage mode grounded capacitance multiplier with widely tunable gain for ultra-low cutoff frequency filter.

A voltage mode capacitance multiplier for ultra-low frequency physiological signal processing is designed with a circuit model. With the proposed multiplier, a filter can achieve a cutoff frequency of 12 mHz with a 1 pF basic capacitance and a 10 kΩ resistor. The corresponding multiplication factor will be 1.35 × 10⁹. By changing the controlling terminal, the multiplication factor can be widely tuned from 1950 to 1.35 × 10⁹ and the corresponding filter cutoff frequency will be from 12 mHz to 8.15 kHz. According to the circuit model, to further increase the multiplication factor to decrease the chip area, more multiplication stages can be added to the feedback loop.

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来源期刊

Science Progress Multidisciplinary-Multidisciplinary

CiteScore

3.80

自引率

0.00%

发文量

119

期刊介绍： Science Progress has for over 100 years been a highly regarded review publication in science, technology and medicine. Its objective is to excite the readers'' interest in areas with which they may not be fully familiar but which could facilitate their interest, or even activity, in a cognate field.