公开(公告)号：US20030020551A1

公开(公告)日：2003-01-30

申请号：US10187401

申请日：2002-06-28

Applicant: STMicroelectronics GmbH

Inventor： Johann Henkel

IPC: H03L007/00

CPC classification number: H03H17/025 ,  H03H17/0288

Abstract: An electric low-pass filter with blocking behavior for a predetermined rejection frequency, comprising a series connection including a FIR filter and an IIR filter, with the parameters of the FIR filter being matched in essence with respect to the blocking behavior at the rejection frequency and the parameters of the IIR filter being matched in essence with respect to the low-pass behavior. It is possible with such a filter to obtain good low-pass behavior with very high attenuation of the frequency to be rejected, with relatively low circuit expenditure and high stability with respect to oscillation tendency.

Abstract translation: 一种具有预定抑制频率的阻塞行为的电低通滤波器，包括包括FIR滤波器和IIR滤波器的串联连接，FIR滤波器的参数本质上与拒绝频率处的阻塞行为相匹配;以及 IIR滤波器的参数本质上与低通行为相匹配。 这种滤波器可以获得良好的低通行为，具有非常高的被拒绝频率的衰减，具有相对低的电路消耗和相对于振荡趋势的高稳定性。