ZA832886B - Surge voltage protection circuits - Google Patents

Surge voltage protection circuits

Info

Publication number
ZA832886B
ZA832886B ZA832886A ZA832886A ZA832886B ZA 832886 B ZA832886 B ZA 832886B ZA 832886 A ZA832886 A ZA 832886A ZA 832886 A ZA832886 A ZA 832886A ZA 832886 B ZA832886 B ZA 832886B
Authority
ZA
South Africa
Prior art keywords
diagonal
circuit
surge voltage
supply voltage
interface circuits
Prior art date
Application number
ZA832886A
Inventor
Hans-Werner Rudolf
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of ZA832886B publication Critical patent/ZA832886B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/049—Circuit arrangements for limiting the number of protection devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

1. A circuit arrangement for surge voltage protection of interface circuits (SLIC 1 to SLIC 3) constructed of semiconductor components and connected in groups to a supply voltage source to connect two-wire, analogue subscriber connection lines (TL) to telephone exchanges, where the circuit arrangement contains, in respect of each interface circuit, a diode bridge whose diodes (D1 to D4) are normally biased in the blocking direction by the supply voltage and which has one diagonal connected to the two wires of the subscriber connection line (TL) in question and its other diagonal connected to the supply voltage via at least one blocking element (Da, L) which assumes the blocked state when a surge voltage occurs and is common to a plurality of interface circuits, and where the circuit arrangement likewise contains by-pass circuit elements (C, V) common to a group of interface circuits via which leakage currents are diverted from the last-mentioned bridge diagonal to a circuit point which carries reference potential on the occurrence of a surge voltage, characterised in that by-pass circuit elements (C, V) are used which flatten and/or limit voltage swings occurring on the occurrence of surge voltages across the bridge diagonal to which they are connected.
ZA832886A 1982-04-26 1983-04-25 Surge voltage protection circuits ZA832886B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823215551 DE3215551A1 (en) 1982-04-26 1982-04-26 CIRCUIT ARRANGEMENT FOR OVERVOLTAGE PROTECTION OF INTERFACE CIRCUITS

Publications (1)

Publication Number Publication Date
ZA832886B true ZA832886B (en) 1984-01-25

Family

ID=6161994

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA832886A ZA832886B (en) 1982-04-26 1983-04-25 Surge voltage protection circuits

Country Status (7)

Country Link
EP (1) EP0092820B1 (en)
JP (2) JPS58195428A (en)
AT (1) ATE21593T1 (en)
BR (1) BR8302094A (en)
DE (1) DE3215551A1 (en)
FI (1) FI79427C (en)
ZA (1) ZA832886B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3340927A1 (en) * 1983-11-11 1985-05-23 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR DERIVATING OVERVOLTAGE
DE3422995C1 (en) * 1984-06-22 1985-11-21 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Overvoltage protection circuit arrangement for telecommunications lines, in particular telephone lines
DE3814661A1 (en) * 1988-04-29 1989-11-09 Nixdorf Computer Ag DEVICE FOR SWITCHING THE CALL AC VOLTAGE ON SUBSCRIBER CONNECTION LINES
GB8827627D0 (en) * 1988-11-25 1989-05-17 Smiths Industries Plc Electrical protection assemblies
DE4229891A1 (en) * 1992-09-05 1994-03-10 Volker Schoenfus Passive integrated circuit giving two output DC voltages from single AC input - has rectifier, voltage limiter, smoothing circuit and two output stages integrated within unit without need of transformer
DE4310233C2 (en) * 1993-03-30 2000-08-10 Thyssen Aufzugswerke Gmbh Protection circuit for inductive consumers
DE4326596C2 (en) * 1993-08-07 1997-07-17 Sel Alcatel Ag Protective circuit arrangement for electronic subscriber circuits
DE10200830B4 (en) * 2002-01-11 2006-01-12 Robert Bosch Gmbh Control device with means for increasing immunity to interference
DE102006026803A1 (en) * 2006-06-07 2007-12-13 Deutsche Thomson-Brandt Gmbh Protective circuit for e.g. sensitive microphone preamplifier, has two zener diodes attached to input stage over other four zener diodes, capacitors arranged parallel to two diodes, and resistors arranged between four diodes and capacitors
US8442213B2 (en) * 2009-08-31 2013-05-14 Microsemi Semiconductor (U.S.) Inc. Method and apparatus for shared positive protection
US8406417B2 (en) * 2009-08-31 2013-03-26 Microsemi Semiconductor (U.S.) Inc. Overvoltage protection with power sink

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598552A (en) * 1945-01-30 1948-02-20 Bertram Morton Hadfield Improvements in or relating to electrical signalling systems
JPS5217216B2 (en) * 1972-02-20 1977-05-13
DE2659044C3 (en) * 1976-12-27 1981-07-16 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for protecting a negative feedback two-stage amplifier against overload and short circuit
US4271446A (en) * 1977-06-27 1981-06-02 Comstock Wilford K Transient voltage suppression system
EP0034288A1 (en) * 1980-02-15 1981-08-26 Felten & Guilleaume Fernmeldeanlagen GmbH Circuit arrangement for usurping excessive voltages
JPS56148131A (en) * 1980-04-21 1981-11-17 Nippon Telegraph & Telephone Lateral surge absorbing circuit
NL8100242A (en) * 1981-01-20 1982-08-16 Philips Nv OVERVOLTAGE PROTECTION OF A LINE CIRCUIT.

Also Published As

Publication number Publication date
EP0092820A1 (en) 1983-11-02
FI79427B (en) 1989-08-31
JP2535573Y2 (en) 1997-05-14
BR8302094A (en) 1983-12-27
JPH0454439U (en) 1992-05-11
DE3215551C2 (en) 1992-01-23
FI79427C (en) 1989-12-11
FI831401L (en) 1983-10-27
ATE21593T1 (en) 1986-09-15
EP0092820B1 (en) 1986-08-20
FI831401A0 (en) 1983-04-25
DE3215551A1 (en) 1983-10-27
JPS58195428A (en) 1983-11-14

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