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    1.
    发明专利
    未知

    公开(公告)号：DE69019746T2

    公开(公告)日：1996-01-25

    申请号：DE69019746

    申请日：1990-08-29

    Applicant: IBM

    Inventor： FERMIER YVAN ,  FERRY MICHEL ,  JACQUART CHRISTIAN ,  VACHEE PIERRE

    IPC: G06F1/30 ,  H02H3/08 ,  H02H3/087 ,  H02J13/00

    Abstract: The overload protection circuit 12 comprises a resistor bridge 20 with a low impedance sensing resistor r and high impedance resistors R1 to R4 which generates voltages Va and Vb at the inputs 32 and 34 of a comparator 22. Voltage Vb depend upon the value of the load current so that the comparator provides at its output 36 a control signal for opening the switching device 24 comprising a field effect transistor when the load current exceeds a maximum value. Resistor R5 reinforces the effect of the control signal. This circuit can be used in a system which comprises a central power supply unit 8 which powers a plurality of devices such as 4. The status of the circuit 12 is reported to the system 8 though line 14 and circuit 12 comprises a control circuit 26 which is responsive to set and reset control signals on lines 14 and 18 from the unit 8 to close or open the switch 26.

    3.
    发明专利
    未知

    公开(公告)号：DE69019746D1

    公开(公告)日：1995-06-29

    申请号：DE69019746

    申请日：1990-08-29

    Applicant: IBM

    Inventor： FERMIER YVAN ,  FERRY MICHEL ,  JACQUART CHRISTIAN ,  VACHEE PIERRE

    IPC: G06F1/30 ,  H02H3/08 ,  H02H3/087 ,  H02J13/00

    Abstract: The overload protection circuit 12 comprises a resistor bridge 20 with a low impedance sensing resistor r and high impedance resistors R1 to R4 which generates voltages Va and Vb at the inputs 32 and 34 of a comparator 22. Voltage Vb depend upon the value of the load current so that the comparator provides at its output 36 a control signal for opening the switching device 24 comprising a field effect transistor when the load current exceeds a maximum value. Resistor R5 reinforces the effect of the control signal. This circuit can be used in a system which comprises a central power supply unit 8 which powers a plurality of devices such as 4. The status of the circuit 12 is reported to the system 8 though line 14 and circuit 12 comprises a control circuit 26 which is responsive to set and reset control signals on lines 14 and 18 from the unit 8 to close or open the switch 26.

    9.
    发明专利
    未知

    公开(公告)号：DE68926740D1

    公开(公告)日：1996-08-01

    申请号：DE68926740

    申请日：1989-04-25

    Applicant: IBM

    Inventor： BADAOUI MOHAMED ,  CALVIGNAC JEAN ,  CARLE GUY ,  GARCIA CHRISTIAN ,  VACHEE PIERRE

    IPC: H04L29/10 ,  G06F13/38 ,  H04L12/28

    Abstract: Interconnection system for attaching a maximum number n of equipment users EU (DCE or DTE) to the line adapter 2 of a communication processing unit. The user data and control bits are carried on transmit and receive serial link 4 and 6 in data and control slot entities arranged in frame of period T, comprising one entity per user. These entities are allocated to the user equipments through multiplexing/demultiplexing circuit 10, link adapters 12-1 to 12-8 and connecting boxes 30-1 to 30-8. The user equipments are connected though active remote modules which are specific to the standardized interfaces of the user equipments. Link adapters 12-1 to 12-8 add to the data and control slot entities an outband slot which is used for exchanging control information, such as the active remote module address and type which are stored in memory 42, to be transmitted to the line adapter 2. The advantage of the interconnection system is that the attachment of the user equipments is simplified.

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