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    HYBRID TRANSCEIVER CIRCUIT
    1.
    发明专利
    HYBRID TRANSCEIVER CIRCUIT 失效

    公开(公告)号：JP2001111460A

    公开(公告)日：2001-04-20

    申请号：JP2000259213

    申请日：2000-08-29

    Applicant: ST MICROELECTRONICS SA

    Inventor： PRAT GILDAS ,  CHIANALE ALAIN

    IPC: H04B3/21 ,  H04B1/58 ,  H04B3/03 ,  H04M1/00 ,  H04M11/06 ,  H04Q3/42

    Abstract: PROBLEM TO BE SOLVED: To provide a new solution for suppressing echoes in a separation band transmission system. SOLUTION: A hybrid circuit forming an interface between a transmission line and a head for transmitting/receiving signals in frequency bands different by transmission and reception includes a line transformer and a means capable of separating a band coupled with an echo cancel means.

    ASYMMETRICAL TRANSFORMER FOR TELEPHONE LINE
    2.
    发明专利
    ASYMMETRICAL TRANSFORMER FOR TELEPHONE LINE 失效

    公开(公告)号：JP2001136107A

    公开(公告)日：2001-05-18

    申请号：JP2000261126

    申请日：2000-08-30

    Applicant: ST MICROELECTRONICS SA

    Inventor： PRAT GILDAS ,  CHIANALE ALAIN

    IPC: H01F19/00 ,  H03H11/32 ,  H04B1/58 ,  H04B3/03 ,  H04B3/20 ,  H04M1/76

    Abstract: PROBLEM TO BE SOLVED: To provide an asymmetrical transformer for telephone line that prevents a structure of an echo cancellation circuit provided between a transformer and a transmission/reception head from being complicated by increasing a voltage in a transmission direction without decreasing a voltage in a receiving direction. SOLUTION: The asymmetrical transformer is provided between a 2-wire line and a transceiver, has at least one primary winding with 1st number of turns connected to the 2-wire line and at least three secondary windings of series connection connected to the transceiver. The asymmetrical transformer is characterized by that respective number of turns of the secondary windings connected in series depends on a desired transformation ratio for the transmission and reception.

    4.
    发明专利
    未知

    公开(公告)号：FR2798022A1

    公开(公告)日：2001-03-02

    申请号：FR0002192

    申请日：2000-02-22

    Applicant: ST MICROELECTRONICS SA

    Inventor： PRAT GILDAS ,  CHIANALE ALAIN

    IPC: H04B3/21 ,  H04B1/58 ,  H04B3/03 ,  H04M1/00 ,  H04M11/06 ,  H04Q3/42

    Abstract: A hybrid circuit forming an interface between a transmission line and heads of transmission-reception of signals in bands of different frequencies in transmission and reception, including a line transformer, and means for separating bands combined with echo cancellation means.

    5.
    发明专利
    未知

    公开(公告)号：FR2798022B1

    公开(公告)日：2008-09-26

    申请号：FR0002192

    申请日：2000-02-22

    Applicant: ST MICROELECTRONICS SA

    Inventor： PRAT GILDAS ,  CHIANALE ALAIN

    IPC: H04B3/03 ,  H04B3/21 ,  H04B1/58 ,  H04M1/00 ,  H04M11/06 ,  H04Q3/42

    Abstract: A hybrid circuit forming an interface between a transmission line and heads of transmission-reception of signals in bands of different frequencies in transmission and reception, including a line transformer, and means for separating bands combined with echo cancellation means.

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