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    41.
    发明专利
    未知

    公开(公告)号：IT1118946B

    公开(公告)日：1986-03-03

    申请号：IT6891479

    申请日：1979-10-04

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BELFORTE PIERO ,  BORTIGNON RENZO

    IPC: H04L5/14 ,  H04B

    Abstract: A transceiver inserted between a signal source and a two-wire or one-wire line, designed to transmit balanced or unbalanced digital signals to a remote station at the opposite end of the line while receiving similar signals from the latter station, comprises a first and a second amplifier with inputs connected to the line at a proximal and a distal end of a line-terminating impedance, respectively. Each amplifier has an inverting output connected to a noninverting output of the other amplifier, the two nodes formed between the interconnected outputs being connected to respective inputs of a differential third amplifier feeding a signal receiver. The gain of the first amplifier is half that of the second amplifier whereby the locally generated signals are suppressed in the output of the third amplifier. The several amplifiers are realized in integrated circuitry and may be provided with switches for selective changeover between a balanced and an unbalanced mode of operation.

    44.
    发明专利
    未知

    公开(公告)号：DK286383A

    公开(公告)日：1983-12-23

    申请号：DK286383

    申请日：1983-06-21

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BELFORTE PIERO ,  GARETTI ENZO ,  PILATI LUCIANO

    IPC: H04Q3/52 ,  H04Q11/04 ,  H04Q

    Abstract: The PCM switching network is based on the use of switching units (UC1a ... UC8c) each equipped with a local controller using a microprocessor (CTR1a ... CTR8c), ancillary circuits for diagnosis (CDTE1 ... CDTU5), ancillary circuits for exchanging messages relating to network control between the local controllers (CRT1a ... CTR8c) and between local controllers and the distributed telephone control units (CTFa ... CTFc), and ancillary circuits (RTBE1 ... RTBU5) providing virtual channels (on the speech channels themselves) for transmission of said messages in a direction opposite to that of speech. Said switching units (UC1a ... UCBc) make it possible to provide self-routing modular PCM switching network structures for distributed-control telephone exchanges.

    47.
    发明专利
    未知

    公开(公告)号：IT1320393B1

    公开(公告)日：2003-11-26

    申请号：ITTO20000527

    申请日：2000-06-05

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BELFORTE PIERO ,  GHIGO GIOVANNI ,  MAGGIONI FLAVIO

    IPC: G01R31/00 ,  G01R31/11 ,  G01R31/3193

    Abstract: Process for the electromagnetic modelling of electronic components and systems, for the extraction of certain electrical parameters, such as the static V-I characteristics and the input and output impedance, the output switching times in particular conditions of load and the transition times of the protection diodes. A test machine of the commercial type is used for these measurements, by generating stimulus signals and measuring the correlated signals, the test machine being suitable for parametric direct current measurements, functional tests and digital integrated circuit timing and also being used as a time domain reflectometer. The measurement phase is followed by a simulation phase during which the electric parameters used for modelling electronic components and systems are extracted.

    48.
    发明专利
    未知

    公开(公告)号：NO315537B1

    公开(公告)日：2003-09-15

    申请号：NO984598

    申请日：1998-10-01

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BELFORTE PIERO ,  MAGGIONI FLAVIO

    IPC: G01R31/28 ,  H04M3/26 ,  G01R1/06

    Abstract: An electronic telecommunications module has circuit components and conductors forming a telecommunications circuit having insertion points at which signals can be applied for test purposes and monitoring points from which responses can be tapped. The insertion and monitoring probes are mounted on the module and are connected to the respective points by shielded microcoaxial cables and the probes are connected by shield and microcoaxial cables on the connectors to allow interfacing between the particular module and the testing and diagnostic system.

    50.
    发明专利
    未知

    公开(公告)号：IT1286293B1

    公开(公告)日：1998-07-08

    申请号：ITTO960256

    申请日：1996-04-02

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BELFORTE PIERO ,  MAGGIONI FLAVIO

    IPC: G01R1/06 ,  G01R31/28 ,  H04M3/26

    Abstract: An electronic telecommunications module has circuit components and conductors forming a telecommunications circuit having insertion points at which signals can be applied for test purposes and monitoring points from which responses can be tapped. The insertion and monitoring probes are mounted on the module and are connected to the respective points by shielded microcoaxial cables and the probes are connected by shield and microcoaxial cables on the connectors to allow interfacing between the particular module and the testing and diagnostic system.

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