GB8703064D0 - Telephone interface protection circuit - Google Patents

Telephone interface protection circuit

Info

Publication number
GB8703064D0
GB8703064D0 GB878703064A GB8703064A GB8703064D0 GB 8703064 D0 GB8703064 D0 GB 8703064D0 GB 878703064 A GB878703064 A GB 878703064A GB 8703064 A GB8703064 A GB 8703064A GB 8703064 D0 GB8703064 D0 GB 8703064D0
Authority
GB
United Kingdom
Prior art keywords
protection circuit
telephone interface
interface protection
telephone
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB878703064A
Other versions
GB2186763A (en
GB2186763B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB8703064D0 publication Critical patent/GB8703064D0/en
Publication of GB2186763A publication Critical patent/GB2186763A/en
Application granted granted Critical
Publication of GB2186763B publication Critical patent/GB2186763B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • 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
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/025—Current limitation using field effect transistors
    • 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)
  • Power Engineering (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
GB8703064A 1986-02-12 1987-02-11 Telephone interface protection circuit Expired GB2186763B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868603472A GB8603472D0 (en) 1986-02-12 1986-02-12 Protection circuit

Publications (3)

Publication Number Publication Date
GB8703064D0 true GB8703064D0 (en) 1987-03-18
GB2186763A GB2186763A (en) 1987-08-19
GB2186763B GB2186763B (en) 1989-11-08

Family

ID=10592941

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868603472A Pending GB8603472D0 (en) 1986-02-12 1986-02-12 Protection circuit
GB8703064A Expired GB2186763B (en) 1986-02-12 1987-02-11 Telephone interface protection circuit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868603472A Pending GB8603472D0 (en) 1986-02-12 1986-02-12 Protection circuit

Country Status (1)

Country Link
GB (2) GB8603472D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412811A1 (en) * 1994-04-14 1995-10-19 Philips Patentverwaltung Switching device with a supply circuit for supplying direct current to a subscriber terminal
FR2719721B1 (en) * 1994-05-09 1996-09-20 Sgs Thomson Microelectronics Telephone line interface protection.
IL115797A0 (en) * 1994-11-02 1996-01-19 Raychem Corp Solid state resettable overcurrent protection device

Also Published As

Publication number Publication date
GB2186763A (en) 1987-08-19
GB2186763B (en) 1989-11-08
GB8603472D0 (en) 1986-03-19

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940211