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    TELEPHONE SUBSCRIBER DEVICE
    1.
    发明专利
    TELEPHONE SUBSCRIBER DEVICE 失效

    公开(公告)号：JPH06303290A

    公开(公告)日：1994-10-28

    申请号：JP33163093

    申请日：1993-12-27

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CONSIGLIO PIETRO ,  ANTONINI CARLO ,  VANALLI GIANPIETRO

    IPC: H04M1/00 ,  H04M1/60 ,  H04M1/738

    Abstract: PURPOSE: To provide a device having a monolithically integrated line switch by providing a circuit interface which drives a pair of switches and providing the circuit interface with a unidirectional current pass circuit element which controls a driving current generated internally. CONSTITUTION: An input terminal E for application of an external electric signal related to a circuit node G and a circuit interface means CI which has output terminals to drive switches SW2 and SW3 through an actuator circuit ACT are provided. In the circuit interface CI, a unidirectional current circuit element like a diode D1 is connected in parallel with the switch SW3 between a terminal 36 of a bridge circuit PP and a circuit node G. That is, the switch SW3 can be operated by the diode D1 provided between the bridge circuit PP and a substrate. Consequently, the driving current generated in the circuit interface means CI by the external electric signal goes to the substrate through the diode in any polarity state.

    ACOUSTIC-FEEDBACK SUPPRESSING DEVICE FOR AUXILIARY RINGER OF PLUG-IN TELEPHONE SYSTEM
    2.
    发明专利
    ACOUSTIC-FEEDBACK SUPPRESSING DEVICE FOR AUXILIARY RINGER OF PLUG-IN TELEPHONE SYSTEM 失效

    公开(公告)号：JPH066439A

    公开(公告)日：1994-01-14

    申请号：JP2550293

    申请日：1993-02-15

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CONSIGLIO PIETRO ,  ANTONINI CARLO

    IPC: H04M1/31 ,  H04M1/74 ,  H04M19/04

    Abstract: PURPOSE: To obtain a restraining device for controlling a voltage taken in a supplemented ringer and limiting a pseudo driving pulse by providing a circuit using rectifying bridges and diodes. CONSTITUTION: A 1st rectifying bridge 10 and a 2nd rectifying bridge 11 are disposed between the input terminals 12 and 13 of a telephone set. An auxiliary ringer 33 is power-supplied via a 1st terminal 29 and the 2nd terminal 13. The cathode terminal of the diodes 17 and 18 are connected to the both ends of the 1st diagonal line of the 2nd rectifying bridge 11. A capacitor 28 operates as the dc separator of a ringer 14. When a call is performed, that is, when a transmitter/receiver unhooked, switches 20, 24 and 31 are closed and a switch 26 is opened, so that a voltage set by a speaking circuit 25 appears in terminals 12 and 13. When in calling, the power supply terminals 29 and 13 to the added ringer 33 are AC-limited by the presence of a Zener diode 21.

    4.
    发明专利
    未知

    公开(公告)号：DE69528356D1

    公开(公告)日：2002-10-31

    申请号：DE69528356

    申请日：1995-05-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CONSIGLIO PIETRO ,  ANTONINI CARLO

    IPC: H04M1/00 ,  H04M1/57 ,  H04M1/738 ,  H04M19/04

    Abstract: A telephone interface circuit with impedance termination during call pauses, comprising: a first and a second terminals of a telephone line; a branch connected to the first terminal, across a decoupling capacitor, and to the second terminal, and furthermore comprising an intersection node; the branch comprises a first switch and a first impedance resistor between the first terminal and the intersection node and a second switch and a second impedance resistor between the second terminal and the intersection node; the intersection node is connected to the ground across a third switch; the first switch, the second switch, and the third switch are controlled by a control unit by means of a first, a second and a third control lines respectively. The circuit furthermore comprises a ring signal detector that is connected to a microprocessor unit capable of activating the control unit in the interval in which the circuit must be terminated for CLID (Calling Line IDentification) transmission.

    5.
    发明专利
    未知

    公开(公告)号：DE69935961D1

    公开(公告)日：2007-06-14

    申请号：DE69935961

    申请日：1999-12-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： ROSSI WALTER ,  LARI FERDINANDO ,  ANTONINI CARLO ,  CONSIGLIO PIETRO ,  VERGANI LUIGI

    IPC: H04M19/02

    Abstract: A subscriber's telephone system is presented that includes at least one driver circuit connected to Tip and Ring terminals. An additional network is connected between an output of the driver circuit and the Ring terminal. This additional network includes a suitably dimensioned capacitor and a diode limiter connected in parallel with each other to minimize the overall voltage while maintaining a desired battery mean value.

    9.
    发明专利
    未知

    公开(公告)号：DE69319942D1

    公开(公告)日：1998-09-03

    申请号：DE69319942

    申请日：1993-02-12

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CONSIGLIO PIETRO ,  ANTONINI CARLO

    IPC: H04M1/31 ,  H04M1/74 ,  H04M19/04

    Abstract: An acoustic feedback suppression device, particularly for auxiliary ringers in plug-in telephone systems, includes diodes (17,18) in addition to a rectifier bridge (11) of the ringer (14). The circuit provides direct-current decoupling and limits the AC voltage present across the auxiliary ringer.

    10.
    发明专利
    未知

    公开(公告)号：IT1254795B

    公开(公告)日：1995-10-11

    申请号：ITMI920336

    申请日：1992-02-17

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CONSIGLIO PIETRO ,  ANTONINI CARLO

    IPC: H04M1/31 ,  H04M1/74 ,  H04M19/04 ,  H04M

    Abstract: An acoustic feedback suppression device, particularly for auxiliary ringers in plug-in telephone systems, includes diodes (17,18) in addition to a rectifier bridge (11) of the ringer (14). The circuit provides direct-current decoupling and limits the AC voltage present across the auxiliary ringer.

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