NL177459C - Abonneelijnketen omvattende een symmetrische versterker. - Google Patents

Abonneelijnketen omvattende een symmetrische versterker.

Info

Publication number
NL177459C
NL177459C NLAANVRAGE7902478,A NL7902478A NL177459C NL 177459 C NL177459 C NL 177459C NL 7902478 A NL7902478 A NL 7902478A NL 177459 C NL177459 C NL 177459C
Authority
NL
Netherlands
Prior art keywords
chain including
symmetrical amplifier
subscriber chain
subscriber
amplifier
Prior art date
Application number
NLAANVRAGE7902478,A
Other languages
English (en)
Dutch (nl)
Other versions
NL177459B (nl
NL7902478A (nl
Original Assignee
Trt Telecom Radio Electr
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 Trt Telecom Radio Electr filed Critical Trt Telecom Radio Electr
Publication of NL7902478A publication Critical patent/NL7902478A/xx
Publication of NL177459B publication Critical patent/NL177459B/xx
Application granted granted Critical
Publication of NL177459C publication Critical patent/NL177459C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
NLAANVRAGE7902478,A 1978-04-03 1979-03-30 Abonneelijnketen omvattende een symmetrische versterker. NL177459C (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7809743A FR2422300A1 (fr) 1978-04-03 1978-04-03 Joncteur comportant un amplificateur de puissance symetrique pour alimenter la ligne d'abonne

Publications (3)

Publication Number Publication Date
NL7902478A NL7902478A (nl) 1979-10-05
NL177459B NL177459B (nl) 1985-04-16
NL177459C true NL177459C (nl) 1985-09-16

Family

ID=9206577

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7902478,A NL177459C (nl) 1978-04-03 1979-03-30 Abonneelijnketen omvattende een symmetrische versterker.

Country Status (11)

Country Link
US (1) US4321430A (de)
JP (1) JPS5537090A (de)
AU (1) AU525957B2 (de)
BE (1) BE875306A (de)
CA (1) CA1132275A (de)
CH (1) CH646560A5 (de)
DE (1) DE2913115C3 (de)
FR (1) FR2422300A1 (de)
GB (1) GB2018093B (de)
NL (1) NL177459C (de)
SE (1) SE434690B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2481035A1 (fr) * 1980-04-18 1981-10-23 Trt Telecom Radio Electr Perfectionnements aux joncteurs d'abonne electroniques
JPS5710598A (en) * 1980-06-20 1982-01-20 Sony Corp Transmitting circuit of microphone output
IT1211072B (it) * 1981-06-30 1989-09-29 Ates Componenti Elettron Circuito raddrizzatore a ponte di transistori per uso telefonico.
JPS58186985U (ja) * 1982-06-09 1983-12-12 本田技研工業株式会社 自動二輪車のシ−ト取付構造
DE3237681C2 (de) * 1982-10-12 1986-03-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand
US4539438A (en) * 1983-08-22 1985-09-03 Northern Telecom Limited Active impedance transformer assisted line feed circuit with supervision filtering
GB2358989B (en) * 2000-02-03 2004-01-21 Lake Electronic Tech A circuit for developing an ac ringing voltage from a dc voltage supply

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2372554A1 (fr) * 1976-11-25 1978-06-23 Jeumont Schneider Equipement de ligne d'abonne pour central telephonique
IT1079588B (it) * 1977-02-14 1985-05-13 Sits Soc It Telecom Siemens Generatore di chiamata statico per sistemi di telecomunicazioni
US4087647A (en) * 1977-05-25 1978-05-02 Bell Telephone Laboratories, Incorporated Circuit for supplying direct current to telephone station sets
US4211896A (en) * 1977-10-17 1980-07-08 Telecommunications Radioelectrique Et Telephoniques T.R.T. Subscriber's circuit with a symmetrical amplifier

Also Published As

Publication number Publication date
AU4562279A (en) 1979-10-11
DE2913115C3 (de) 1981-07-30
US4321430A (en) 1982-03-23
CA1132275A (en) 1982-09-21
SE434690B (sv) 1984-08-06
NL177459B (nl) 1985-04-16
JPS5537090A (en) 1980-03-14
GB2018093B (en) 1982-06-23
SE7902832L (sv) 1979-10-04
NL7902478A (nl) 1979-10-05
GB2018093A (en) 1979-10-10
FR2422300B1 (de) 1980-09-19
DE2913115A1 (de) 1979-10-04
CH646560A5 (de) 1984-11-30
JPS5747584B2 (de) 1982-10-09
BE875306A (fr) 1979-10-03
DE2913115B2 (de) 1980-10-02
AU525957B2 (en) 1982-12-09
FR2422300A1 (fr) 1979-11-02

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Legal Events

Date Code Title Description
A1A A request for search or an international-type search has been filed
BB A search report has been drawn up
BT A document has been added to the application laid open to public inspection
BC A request for examination has been filed
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
V1 Lapsed because of non-payment of the annual fee