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Patent Agency Ranking1.发明专利
公开(公告)号：JPH066423A
公开(公告)日：1994-01-14
申请号：JP2566393
申请日：1993-02-15
Applicant: ST MICROELECTRONICS SRL
Abstract: PURPOSE: To avoid the occurrence of the erroneous closing of a device switch in telephone communication. CONSTITUTION: A device for limiting an operating voltage for the device switch in elephone communication includes connecting terminals 20 and 21 to a telephone line, and a connection and a source branch for a control circuit 24 extending from the 1st terminal 21. The branch has a 1st switch 25. The cathode terminal of a 1st Zener diode 26 and the source terminal of a 1st MOSFET transistor 27 are connected to the output terminal of the 1st switch 25. The gate terminal of the 1st MOSFET transistor 27 is connected to the 1st terminal 2 via the anode terminal of the Zener diode 26. A current absorbed by this device may be controlled.
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公开(公告)号：DE69323101D1
公开(公告)日：1999-03-04
申请号：DE69323101
申请日：1993-02-12
Applicant: ST MICROELECTRONICS SRL
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公开(公告)号：IT1254796B
公开(公告)日：1995-10-11
申请号：ITMI920339
申请日：1992-02-17
Applicant: ST MICROELECTRONICS SRL
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公开(公告)号：DE69323101T2
公开(公告)日：1999-06-02
申请号：DE69323101
申请日：1993-02-12
Applicant: ST MICROELECTRONICS SRL
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公开(公告)号：ITMI920339D0
公开(公告)日：1992-02-17
申请号：ITMI920339
申请日：1992-02-17
Applicant: ST MICROELECTRONICS SRL , SGS THOMSON MICROELECTRONICS
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