SE9502018D0 - Method and apparatus for indicating an overload in a coupling element - Google Patents

Method and apparatus for indicating an overload in a coupling element

Info

Publication number
SE9502018D0
SE9502018D0 SE9502018A SE9502018A SE9502018D0 SE 9502018 D0 SE9502018 D0 SE 9502018D0 SE 9502018 A SE9502018 A SE 9502018A SE 9502018 A SE9502018 A SE 9502018A SE 9502018 D0 SE9502018 D0 SE 9502018D0
Authority
SE
Sweden
Prior art keywords
overload
current
indicating
switch
signal
Prior art date
Application number
SE9502018A
Other languages
Swedish (sv)
Other versions
SE9502018L (en
Inventor
Jarmo Loukusa
Kauko Varanka
Original Assignee
Nokia Telecommunications Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of SE9502018D0 publication Critical patent/SE9502018D0/en
Publication of SE9502018L publication Critical patent/SE9502018L/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0812—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
    • H03K17/08126—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit in bipolar transitor switches

Abstract

The invention concerns a method and arrangement for indicating an overload in a direct current switch. In the method is measured an overload of a switching element (Q4, Q5) provided with a control switch (Q3) and supplying a signal path (A). To detect an overload, the current (I) passing through the control switch (Q3) of the switching element (Q4, Q5) is examined. When a change is detected in the current (I) passing through the control switch (Q3) of the switching element (Q4, Q5) supplying the signal path (A), a control signal (K) controlling the overload current is generated from the main current path of the control switch (Q3) to an indicator switch (Q12). By means of the control signal (K) is generated an indicator signal (L) indicating the overload current. <IMAGE>
SE9502018A 1992-11-30 1995-06-01 Method and apparatus for indicating an overload in a coupling element SE9502018L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI925450A FI93065C (en) 1992-11-30 1992-11-30 Method and arrangement for detecting an overload condition of a coupling member
PCT/FI1993/000507 WO1994013062A1 (en) 1992-11-30 1993-11-30 Method and arrangement for indicating an overload in a switching element

Publications (2)

Publication Number Publication Date
SE9502018D0 true SE9502018D0 (en) 1995-06-01
SE9502018L SE9502018L (en) 1995-06-01

Family

ID=8536298

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9502018A SE9502018L (en) 1992-11-30 1995-06-01 Method and apparatus for indicating an overload in a coupling element

Country Status (7)

Country Link
EP (1) EP0671077A1 (en)
AU (1) AU5564494A (en)
DE (1) DE4396117T1 (en)
FI (1) FI93065C (en)
GB (1) GB2288031B (en)
SE (1) SE9502018L (en)
WO (1) WO1994013062A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765909A (en) * 1980-10-13 1982-04-21 Fujitsu Ltd Line driver circuit having overcurrent protecting function
US4321648A (en) * 1981-02-25 1982-03-23 Rca Corporation Over-current protection circuits for power transistors
DE3309492A1 (en) * 1983-03-14 1984-09-20 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT WITH A SWITCHING TRANSISTOR
IT1238305B (en) * 1989-11-30 1993-07-12 Sgs Thomson Microelectronics "CURRENT DETECTION CIRCUIT IN A MOS TYPE POWER TRANSISTOR"

Also Published As

Publication number Publication date
GB2288031B (en) 1996-08-07
GB9510895D0 (en) 1995-08-02
DE4396117T1 (en) 1995-10-19
FI925450A0 (en) 1992-11-30
AU5564494A (en) 1994-06-22
GB2288031A (en) 1995-10-04
EP0671077A1 (en) 1995-09-13
WO1994013062A1 (en) 1994-06-09
FI93065B (en) 1994-10-31
FI925450A (en) 1994-05-31
FI93065C (en) 1995-02-10
SE9502018L (en) 1995-06-01

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Legal Events

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