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公开(公告)号：DE69726328T2
公开(公告)日：2004-09-30
申请号：DE69726328
申请日：1997-03-25
Applicant: ST MICROELECTRONICS SA
Inventor： BREMOND ANDRE , MERCERON PHILIPPE
Abstract: The method involves performing protection for an interface (1) which is coupled between a telephone exchange and relays (I1,I2) connected to a subscriber line (T,R). On the line side of the relays, a single overload protection device (10) is used, with a thyristor module provided for each polarity of voltage. The overload protection device has parameters which are determined according to the relay control signal supplied from the interface. The relay control block (5) is switched conventionally by a transistor (Tc) which may be integrated with its base resistor (Rc) into the interface circuit.
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公开(公告)号：FR2809545B1
公开(公告)日：2002-10-11
申请号：FR0006573
申请日：2000-05-23
Applicant: ST MICROELECTRONICS SA
Inventor： BREMOND ANDRE , MERCERON PHILIPPE
Abstract: A series device for protection against a heating of aparallel protection element of an equipment of a telephone line, including a bi-directional cut-off element, of normally on state and placed in series with the parallel protection element, a temperature detection element, and a switching element adapted to turning off the cut-off element when the temperature detected by the detection element exceeds a predetermined threshold.
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公开(公告)号：FR2809545A1
公开(公告)日：2001-11-30
申请号：FR0006573
申请日：2000-05-23
Applicant: ST MICROELECTRONICS SA
Inventor： BREMOND ANDRE , MERCERON PHILIPPE
Abstract: A series device for protection against a heating of aparallel protection element of an equipment of a telephone line, including a bi-directional cut-off element, of normally on state and placed in series with the parallel protection element, a temperature detection element, and a switching element adapted to turning off the cut-off element when the temperature detected by the detection element exceeds a predetermined threshold.
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