Analog equalization low pass filter structure
    12.
    发明公开
    Analog equalization low pass filter structure 有权
    Tiefpassfilterstruktur mit analoger Entzerrung

    公开(公告)号:EP1014573A1

    公开(公告)日:2000-06-28

    申请号:EP98830760.9

    申请日:1998-12-17

    CPC classification number: H03H11/0422

    Abstract: A low pass filter with programmable equalization comprising at least a biquadratic cell (BIQUAD) and a converter of the input voltage (Vin) in a current ( iz ), proportional to the derivative of the input voltage, that is injected on a node of the biquadratic cell (BIQUAD) in order to introduce two real and opposed zeroes in the transfer function of the filter, is composed of two structurally similar circuits, functionally connected in cascade, each circuit being composed of a biquadratic cell and an input stage having two outputs injecting through a first current output (A) said current ( iz ) on an input capacitor (C1) of the respective biquadratic cell, by a direct coupling in a first of said two circuits and in an inverted manner in the second of said two circuits; a second voltage output (B) being coupled to an input of the respective biquadratic cell.

    Abstract translation: 具有可编程均衡的低通滤波器,其包括至少一个二次电池(BIQUAD)和与输入电压的导数成比例的电流(iz)中的输入电压(Vin)的转换器,其被注入到 为了在滤波器的传递函数中引入两个实数和相对的零点,双级电容(BIQUAD)由两个结构相似的电路组成,功能上串联连接,每个电路由一个二次电池和一个具有两个输出的输入级组成 通过第一电流输出(A),通过在所述两个电路中的第一个中的直接耦合并且在所述两个电路中的第二个中以反向方式,在相应的二次电池的输入电容器(C1)上注入所述电流(iz) ; 第二电压输出(B)耦合到相应的双二次电池的输入端。

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