11.
    发明专利
    未知

    公开(公告)号:DE2502527A1

    公开(公告)日:1975-07-31

    申请号:DE2502527

    申请日:1975-01-22

    Applicant: CIT ALCATEL

    Abstract: 1461235 Automatic current control COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 23 Jan 1975 [24 Jan 1974] 2933/75 Heading G3R A series transistor current regulator includes a current sensing resistor and a constant voltage diode supplied with stabilized current from a resistor network. The diode is connected to the base of the series transistor through the basecollector path of a second transistor and a second constant voltage diode. The base-emitter junction of a third transistor is connected across the series connection of the current sensing resistor and the first diode. As shown, a two-terminal network 2 is connected between a D.C. source 1 and a resistive load 3 in a repeatered telecommunications line. The current is sensed by a resistor 5, the potential across which controls the conductivity of a transistor 12, which in turn controls series transistor 4. A reference potential is provided by a Zener diode 10 which receives a constant current supply from a transistor 9, resistors 7, 11, 13, 14 and a second Zener diode 8. A parallel resistor 6 limits the power dissipated in the series transistor 4, and a pair of Zener diodes 17, 18 limit the total voltage across the network 2. Diodes 15, 16 provide temperature compensation. If a high supply voltage and/or low resistance load are used, several networks of the illustrated.type may be connected in series.

    12.
    发明专利
    未知

    公开(公告)号:FI750121A

    公开(公告)日:1975-07-25

    申请号:FI750121

    申请日:1975-01-20

    Applicant: CIT ALCATEL

    Abstract: 1461235 Automatic current control COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 23 Jan 1975 [24 Jan 1974] 2933/75 Heading G3R A series transistor current regulator includes a current sensing resistor and a constant voltage diode supplied with stabilized current from a resistor network. The diode is connected to the base of the series transistor through the basecollector path of a second transistor and a second constant voltage diode. The base-emitter junction of a third transistor is connected across the series connection of the current sensing resistor and the first diode. As shown, a two-terminal network 2 is connected between a D.C. source 1 and a resistive load 3 in a repeatered telecommunications line. The current is sensed by a resistor 5, the potential across which controls the conductivity of a transistor 12, which in turn controls series transistor 4. A reference potential is provided by a Zener diode 10 which receives a constant current supply from a transistor 9, resistors 7, 11, 13, 14 and a second Zener diode 8. A parallel resistor 6 limits the power dissipated in the series transistor 4, and a pair of Zener diodes 17, 18 limit the total voltage across the network 2. Diodes 15, 16 provide temperature compensation. If a high supply voltage and/or low resistance load are used, several networks of the illustrated.type may be connected in series.

    13.
    发明专利
    未知

    公开(公告)号:FI59883B

    公开(公告)日:1981-06-30

    申请号:FI750121

    申请日:1975-01-20

    Applicant: CIT ALCATEL

    Abstract: 1461235 Automatic current control COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 23 Jan 1975 [24 Jan 1974] 2933/75 Heading G3R A series transistor current regulator includes a current sensing resistor and a constant voltage diode supplied with stabilized current from a resistor network. The diode is connected to the base of the series transistor through the basecollector path of a second transistor and a second constant voltage diode. The base-emitter junction of a third transistor is connected across the series connection of the current sensing resistor and the first diode. As shown, a two-terminal network 2 is connected between a D.C. source 1 and a resistive load 3 in a repeatered telecommunications line. The current is sensed by a resistor 5, the potential across which controls the conductivity of a transistor 12, which in turn controls series transistor 4. A reference potential is provided by a Zener diode 10 which receives a constant current supply from a transistor 9, resistors 7, 11, 13, 14 and a second Zener diode 8. A parallel resistor 6 limits the power dissipated in the series transistor 4, and a pair of Zener diodes 17, 18 limit the total voltage across the network 2. Diodes 15, 16 provide temperature compensation. If a high supply voltage and/or low resistance load are used, several networks of the illustrated.type may be connected in series.

    TELEALIMENTATION D'UNE LIGNE DE TRANSMISSION PAR CŸBLES AVEC REPETEURS ISE A L'INFLUENCE DE CHAMPS ELECTRIQUES EXTERNES

    公开(公告)号:CA1065259A

    公开(公告)日:1979-10-30

    申请号:CA273075

    申请日:1977-03-03

    Applicant: CIT ALCATEL

    Inventor: MIGEON RENE

    Abstract: Téléalimentation d'une ligne de transmission par câbles avec répéteurs soumise à l'influence de champs électriques externes comportant, dans le circuit local d'alimentation de chaque répéteur intercalé entre deux tronçons de ligne, au moins un transformateur de courant ayant deux enroulements primaires identiques, l'un intercalé dans une première dérivation reliant le conducteur interne d'un tronçon de ligne au conducteur externe de l'autre tronçon de ligne, l'autre intercalé dans une deuxième dérivation reliant les autres conducteurs des troncons de ligne. Elle s'applique à l'alimentation des répéteurs d'une ligne mono-coaxiale de transmission.

    16.
    发明专利
    未知

    公开(公告)号:DE1814331A1

    公开(公告)日:1969-07-24

    申请号:DE1814331

    申请日:1968-12-12

    Applicant: CIT ALCATEL

    Inventor: MIGEON RENE

    17.
    发明专利
    未知

    公开(公告)号:FI59883C

    公开(公告)日:1981-10-12

    申请号:FI750121

    申请日:1975-01-20

    Applicant: CIT ALCATEL

    Abstract: 1461235 Automatic current control COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 23 Jan 1975 [24 Jan 1974] 2933/75 Heading G3R A series transistor current regulator includes a current sensing resistor and a constant voltage diode supplied with stabilized current from a resistor network. The diode is connected to the base of the series transistor through the basecollector path of a second transistor and a second constant voltage diode. The base-emitter junction of a third transistor is connected across the series connection of the current sensing resistor and the first diode. As shown, a two-terminal network 2 is connected between a D.C. source 1 and a resistive load 3 in a repeatered telecommunications line. The current is sensed by a resistor 5, the potential across which controls the conductivity of a transistor 12, which in turn controls series transistor 4. A reference potential is provided by a Zener diode 10 which receives a constant current supply from a transistor 9, resistors 7, 11, 13, 14 and a second Zener diode 8. A parallel resistor 6 limits the power dissipated in the series transistor 4, and a pair of Zener diodes 17, 18 limit the total voltage across the network 2. Diodes 15, 16 provide temperature compensation. If a high supply voltage and/or low resistance load are used, several networks of the illustrated.type may be connected in series.

    18.
    发明专利
    未知

    公开(公告)号:FR2469053A1

    公开(公告)日:1981-05-08

    申请号:FR7926614

    申请日:1979-10-26

    Applicant: CIT ALCATEL

    Abstract: The present invention is concerned with maintaining the power supply to equipments along at least a section of a transmission line in the event of said line being cut. Each equipment (5) along the line (1) is provided with a local power supply circuit (6,7,9) inserted in the remote power supply loop at the equipment under consideration. A looping impedance (10) is connected in series with the break contacts (11,12) of a controlled switch and parallel across the power supply loop in such a manner as to create a partial power supply loop through the local power supply circuit when the switch is closed. Control means are provided to close the switch in the event of a power failure in the local power supply circuit, and to open the switch again only once the downstream side of the power supply loop draws current above a predetermined threshold value. The above circuit operates for a power supply loop that includes an energy source at one end (E) only of the transmission line. A variant embodiment of the invention operates in a transmission line where power may be drawn from either end. The invention is applicable to transmission circuits that include at least one branch of a point to point connection.

    19.
    发明专利
    未知

    公开(公告)号:DK142662B

    公开(公告)日:1980-12-08

    申请号:DK20475

    申请日:1975-01-23

    Applicant: CIT ALCATEL

    Abstract: 1461235 Automatic current control COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 23 Jan 1975 [24 Jan 1974] 2933/75 Heading G3R A series transistor current regulator includes a current sensing resistor and a constant voltage diode supplied with stabilized current from a resistor network. The diode is connected to the base of the series transistor through the basecollector path of a second transistor and a second constant voltage diode. The base-emitter junction of a third transistor is connected across the series connection of the current sensing resistor and the first diode. As shown, a two-terminal network 2 is connected between a D.C. source 1 and a resistive load 3 in a repeatered telecommunications line. The current is sensed by a resistor 5, the potential across which controls the conductivity of a transistor 12, which in turn controls series transistor 4. A reference potential is provided by a Zener diode 10 which receives a constant current supply from a transistor 9, resistors 7, 11, 13, 14 and a second Zener diode 8. A parallel resistor 6 limits the power dissipated in the series transistor 4, and a pair of Zener diodes 17, 18 limit the total voltage across the network 2. Diodes 15, 16 provide temperature compensation. If a high supply voltage and/or low resistance load are used, several networks of the illustrated.type may be connected in series.

    REGULATEUR A ACTION CONTINUE
    20.
    发明专利

    公开(公告)号:CA1085005A

    公开(公告)日:1980-09-02

    申请号:CA291374

    申请日:1977-11-21

    Applicant: CIT ALCATEL

    Abstract: : Régulateur de niveau à action continue sensible à l'amplitude d'une onde pilote incluse dans le signal dont le niveau est à réguler, comportant un quadripôle à gain variable traversé par ledit signal, une boucle de contrôle automatique de gain agissant sur un circuit de commande du gain du quadripôle à gain variable et une boucle auxiliaire grâce à laquelle le circuit de commande agit égale-ment en réaction sur la boucle de contrôle automatique de gain. Ledit régla-teur s'utilise avantageusement dans les systèmes de transmission.

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