一种改善KHN状态变量滤波器高频性能的方案

1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268) Pub Date : 1998-08-09 DOI:10.1109/MWSCAS.1998.759526

D. Baez-López, G. Espinosa, L.I.V. Jurez, F.M. Hernandez, G.O. Romero, J. M. Ramirez

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引用次数: 1

摘要

状态变量滤波器，也称为KHN滤波器，以其对无源元件的低灵敏度而闻名。然而，它对运算放大器的有限增益带宽乘积的敏感性限制了它在高频中的性能。这种修改包括在求和放大器中提供正反馈。给出了该方案的仿真结果，并与传统的KHN滤波器进行了比较。

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A scheme for the KHN state variable filter to improve its high frequency performance

The state variable filter, also known as the KHN filter, is well known for its low sensitivities to the passive elements. However, its sensitivities to the finite gain bandwidth product of the operational amplifiers limit its performance for high frequencies. This modification consists in providing a positive feedback in the summing amplifier. Simulation of the proposed scheme and a comparison of the results with the conventional KHN filter is presented.

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1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)

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