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    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

    Applicant: STMicroelectronics S.r.l.

    Inventor： Bollati, Giacomino ,  Alini, Roberto ,  Ottini, Daniele ,  Bruccoleri, Melchiorre

    IPC: H03H11/04

    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。

    BICMOS transconductor differential stage for high-frequency filters
    18.
    发明公开
    BICMOS transconductor differential stage for high-frequency filters 失效
    用于高频滤波器的BICMOS跨导差分级

    公开(公告)号：EP0810723A1

    公开(公告)日：1997-12-03

    申请号：EP96830311.5

    申请日：1996-05-31

    Applicant: SGS-THOMSON MICROELECTRONICS s.r.l. ,  CO.RI.M.ME.

    Inventor： Pisati, Valerio ,  Alini, Roberto ,  Cosentino, Gaetano ,  Vai, Gianfranco

    IPC: H03H1/00 ,  H03F3/45 ,  H03F3/72

    CPC classification number: H03F3/72 ,  H03F3/45286 ,  H03F2203/45302 ,  H03F2203/45304 ,  H03F2203/45371 ,  H03F2203/45396 ,  H03F2203/45506

    Abstract: A BiCMOS Transconductor differential stage (10) for high frequency filters comprises an input circuit portion having signal inputs (IN+,IN-) and comprising a pair of MOS transistors (M1,M2) having their respective gate terminals (G1,G2) corresponding to the signal inputs as well as an output circuit portion having signal outputs (OUT-,OUT+) and comprising a pair of two-pole transistors (Q1,Q2) connected together with a common base in a circuit node (B) and inserted between inputs (IN+,IN-) and outputs (OUT-,OUT+) in cascode configuration. The stage (10) in accordance with the present invention calls for a switching device (3) associated with at least one of said added two-pole transistors (Q1,Q2) to change the connections between the parasite capacitors present in the transconductor stage. The switching device (3) also comprises at least one added two-pole transistor (Q1x, Q2x) connected in a removable manner in parallel with the corresponding two-pole cascode transistor (Q1,Q2).
    In a variant embodiment there are also provided respective added MOS transistors (M1x,M2x) connected in parallel with the MOS transistors (M1,M2) of the input portion to change the ratio W:L of each of the input transistors (M1,M2).

    Abstract translation: 一种用于高频滤波器的BiCMOS跨导差分级（10）包括具有信号输入端（IN +，IN-）并包括一对MOS晶体管（M1，M2）的输入电路部分，所述一对MOS晶体管的各自的栅极端子（G1，G2） 信号输入端以及具有信号输出端（OUT-，OUT +）的输出电路部分，并且包括在电路节点（B）中用公共基极连接在一起的一对双极晶体管（Q1，Q2），并插入在输入端 （IN +，IN-）和输出（OUT-，OUT +）级联配置。 根据本发明的级（10）需要与所述增加的双极晶体管（Q1，Q2）中的至少一个相关联的开关器件（3）改变跨导级中存在的寄生电容器之间的连接。 开关器件（3）还包括至少一个与对应的双极共源共栅晶体管（Q1，Q2）并联连接的增加的双极晶体管（Q1x，Q2x）。 在变型实施例中，还提供了与输入部分的MOS晶体管（M1，M2）并联连接的相应增加的MOS晶体管（M1x，M2x），以改变每个输入晶体管（M1，M2）的比率W:L ）。

    An amplifier with a low offset
    19.
    发明公开
    An amplifier with a low offset 失效
    EinVerstärkermit Niedrigem Offset

    公开(公告)号：EP0786858A1

    公开(公告)日：1997-07-30

    申请号：EP96830035.0

    申请日：1996-01-26

    Applicant: SGS-THOMSON MICROELECTRONICS s.r.l. ,  CO.RI.M.ME. CONSORZIO PER LA RICERCA SULLA MICROELETTRONICA NEL MEZZOGIORNO

    Inventor： Alini, Roberto ,  Bruccoleri, Melchiorre ,  Cosentino, Gaetano ,  Pisati, Valerio

    IPC: H03F1/00 ,  H03F3/30

    CPC classification number: H03F3/3077

    Abstract: The amplifier described has an output stage constituted by an npn transistor (Q1) and a pnp transistor (Q2) in a push-pull arrangement, and a driver stage. The latter comprises a current-mirror circuit having, in its input branch, a pnp transistor (Q3) in series with a first constant-current generator (G1) and, in its output branch, an npn transistor (Q4), and two complementary transistors (Q5 and Q6) of which the collectors are connected together to the output terminal (OUT) and the bases are connected together to the input terminal (IN) of the amplifier. The emitter of the pnp transistor (Q5) of the driver stage is connected to the positive terminal (vdd) of the supply by means of a second constant-current generator (G2) and to the base of the npn transistor (Q1) of the output stage, and the emitter of the npn transistor (Q6) of the driver stage is connected to the negative terminal (gnd) of the supply by means of the npn transistor (Q4) of the output branch of the current-mirror circuit and to the base of the pnp transistor (Q2) of the output stage.
    The amplifier has a very low or zero offset ( Vos = Vout-Vin ).

    Abstract translation: 所描述的放大器具有由推挽装置中的npn晶体管（Q1）和pnp晶体管（Q2）和驱动器级构成的输出级。 后者包括电流镜电路，其在其输入支路中具有与第一恒定电流发生器（G1）串联的pnp晶体管（Q3），并且在其输出支路中具有npn晶体管（Q4）和两个互补的 集电极一起连接到输出端（OUT）的晶体管（Q5和Q6）和基极连接在放大器的输入端（IN）上。 驱动级的pnp晶体管（Q5）的发射极通过第二恒流发生器（G2）连接到电源的正端子（vdd），并连接到电源的npn晶体管（Q1）的基极 输出级，并且驱动级的npn晶体管（Q6）的发射极通过电流镜电路的输出支路的npn晶体管（Q4）连接到电源的负极（gnd），并且 输出级的pnp晶体管（Q2）的基极。 放大器具有非常低或零偏移（Vos = Vout-Vin）。

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