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    Monolithically integrated telephone circuit for driving wide-band telephone lines for data transmission
    3.
    发明公开
    Monolithically integrated telephone circuit for driving wide-band telephone lines for data transmission 有权
    单片集成订户电路装置，用于驱动用于数据传输的宽带线

    公开(公告)号：EP1017211A2

    公开(公告)日：2000-07-05

    申请号：EP99126236.1

    申请日：1999-12-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： Pasetti, Mauro ,  Milanese, Carlo Maria

    IPC: H04M3/00 ,  H04M19/00

    CPC classification number: H04M3/005 ,  H04M11/062 ,  H04M19/005

    Abstract: The invention relates to a monolithically integrated telephone circuit for driving wide-band telephone lines and transmitting digital data at a very high frequency. The telephone circuit is powered from a battery DC supply providing a pair of voltage references. The telephone circuit includes an output circuit portion including a pair of differential output stages, each having a pair of inputs and being connected with its output to a respective lead of a two-wire telephone line. The telephone circuit also includes a device for deriving a reference voltage from the supply voltage, and includes a low-voltage supply network which is input a DC signal and produces a voltage reference to be added to the reference voltage for delivery to one input of each output stage. The other input of each stage receives an AC signal in order to present at the circuit output a suitable AC+DC differential voltage for driving the telephone line.

    Abstract translation: 本发明涉及到一个单片集成电话电路，用于以非常高的频率驱动宽带电话线和发送数字数据。 电话电路从电池的直流电源提供的一对基准电压的供电。 电话电路包括包含一对差动输出级，每一个都具有一对输入端和同其输出到一个两线电话线的respectivement引线被连接输出电路部分。 因此，该电话电路包括用于从电源电压的参考电压的装置，并且包括一个低电压供电网络的所有所输入的DC信号，并产生一个参考电压被添加到用于递送所述基准电压施加到每个的一个输入 输出级。 每个级的另一输入，以呈现在所述电路输出的合适的AC + DC差分电压用于驱动电话线路上接收的AC信号。

    Equaliser
    5.
    发明公开
    Equaliser 有权
    Entzerrer

    公开(公告)号：EP1154586A1

    公开(公告)日：2001-11-14

    申请号：EP00830343.0

    申请日：2000-05-12

    Applicant: STMicroelectronics S.r.l.

    Inventor： Guinea, Jesus ,  Tomasini, Luciano ,  Milanese, Carlo Maria

    IPC: H04B3/14 ,  H03H11/04

    CPC classification number: H03H11/1291 ,  H03H11/0422 ,  H04B3/145

    Abstract: The present invention refers to a method and to an equalizer circuit of signals transmitted on a line. In an embodiment the equaliser circuit of signals transmitted on a line having an attenuation comprising: an analogical adaptive filter (1) applied in series to said line comprises at least two transconductance filters having a bias current (Pc1-Pcn) each and to which it is associated at least one pole and at least one zero the position in frequency of which in the working band (B) is variable in response to said bias current (Pc1-Pcn); a retroaction circuit (3, 4, 5, 6, 7) applied to the output of said filter (1) able to vary said bias current (Pc1-Pcn); said bias current (Pc1-Pcn) varies at the varying of said attenuation of said line; characterised in that said at least two transconductance filters have said bias current of prefixed value; said bias current is made to vary at the increasing of said attenuation so that said at least one pole is moved toward the high frequencies; said bias current is made to vary at the increasing of said attenuation so that said at least a zero is moved toward the low frequencies.

    Abstract translation: 本发明涉及在一条线路上发送的信号的方法和均衡器电路。 在一个实施例中，在具有衰减的线路上传输的信号的均衡器电路包括：与所述线串联施加的模拟自适应滤波器（1），包括至少两个具有偏置电流（Pc1-Pcn）的跨导滤波器， 至少一个极点和至少一个零点，工作频带（B）的频率位置响应于所述偏置电流（Pc1-Pcn）是可变的; 施加到能够改变所述偏置电流（Pc1-Pcn）的所述滤波器（1）的输出的回溯电路（3,4,5,6,7）; 所述偏置电流（Pc1-Pcn）在所述线路的衰减变化时变化; 其特征在于，所述至少两个跨导滤波器具有所述预定值的偏置电流; 所述偏置电流在所述衰减的增加中变化，使得所述至少一个极向高频移动; 所述偏置电流在所述衰减的增加中变化，使得所述至少一个零向低频移动。

    Monolithically integrated telephone circuit for driving wide-band telephone lines for data transmission
    6.
    发明公开
    Monolithically integrated telephone circuit for driving wide-band telephone lines for data transmission 有权
    单片集成订户电路装置，用于驱动用于数据传输的宽带线

    公开(公告)号：EP1017211A3

    公开(公告)日：2003-06-25

    申请号：EP99126236.1

    申请日：1999-12-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： Pasetti, Mauro ,  Milanese, Carlo Maria

    IPC: H04M3/00 ,  H04M19/00

    CPC classification number: H04M3/005 ,  H04M11/062 ,  H04M19/005

    Abstract: The invention relates to a monolithically integrated telephone circuit for driving wide-band telephone lines and transmitting digital data at a very high frequency. The telephone circuit is powered from a battery DC supply providing a pair of voltage references. The telephone circuit includes an output circuit portion including a pair of differential output stages, each having a pair of inputs and being connected with its output to a respective lead of a two-wire telephone line. The telephone circuit also includes a device for deriving a reference voltage from the supply voltage, and includes a low-voltage supply network which is input a DC signal and produces a voltage reference to be added to the reference voltage for delivery to one input of each output stage. The other input of each stage receives an AC signal in order to present at the circuit output a suitable AC+DC differential voltage for driving the telephone line.

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