NL177459C - Abonneelijnketen omvattende een symmetrische versterker. - Google Patents

Abonneelijnketen omvattende een symmetrische versterker.

Info

Publication number: NL177459C
Authority: NL; Netherlands
Prior art keywords: chain including; symmetrical amplifier; subscriber chain; subscriber; amplifier
Prior art date: 1978-04-03

Application number

NLAANVRAGE7902478,A

Other languages

English (en)

Dutch (nl)

Other versions

NL7902478A (nl

NL177459B (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.)

1978-04-03

Filing date

1979-03-30

Publication date

1985-09-16

1979-03-30 Application filed by Trt Telecom Radio Electr filed Critical Trt Telecom Radio Electr

1979-10-05 Publication of NL7902478A publication Critical patent/NL7902478A/xx

1985-04-16 Publication of NL177459B publication Critical patent/NL177459B/xx

1985-09-16 Application granted granted Critical

1985-09-16 Publication of NL177459C publication Critical patent/NL177459C/xx

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 (xx)
JP (1)	JPS5537090A (xx)
AU (1)	AU525957B2 (xx)
BE (1)	BE875306A (xx)
CA (1)	CA1132275A (xx)
CH (1)	CH646560A5 (xx)
DE (1)	DE2913115C3 (xx)
FR (1)	FR2422300A1 (xx)
GB (1)	GB2018093B (xx)
NL (1)	NL177459C (xx)
SE (1)	SE434690B (xx)

Families Citing this family (6)

* 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.
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

1978
- 1978-04-03 FR FR7809743A patent/FR2422300A1/fr active Granted
1979
- 1979-03-29 CH CH294679A patent/CH646560A5/de not_active IP Right Cessation
- 1979-03-29 CA CA324,457A patent/CA1132275A/en not_active Expired
- 1979-03-30 AU AU45622/79A patent/AU525957B2/en not_active Ceased
- 1979-03-30 SE SE7902832A patent/SE434690B/sv not_active IP Right Cessation
- 1979-03-30 NL NLAANVRAGE7902478,A patent/NL177459C/xx not_active IP Right Cessation
- 1979-03-30 GB GB7911212A patent/GB2018093B/en not_active Expired
- 1979-04-02 DE DE2913115A patent/DE2913115C3/de not_active Expired
- 1979-04-03 JP JP3941379A patent/JPS5537090A/ja active Granted
- 1979-04-03 BE BE0/194394A patent/BE875306A/xx not_active IP Right Cessation
1980
- 1980-08-06 US US06/175,810 patent/US4321430A/en not_active Expired - Lifetime

Also Published As

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

Publication	Publication Date	Title
NL166834C (nl)	1981-09-15	Constructie voor een telecommunicatiecentrale.
NL7903922A (nl)	1979-11-26	Afstandketen.
NL7714367A (nl)	1978-07-04	Versterkingseenheid en constructie, zoals een golfbreker, bevattende een dergelijke verster- kingseenheid.
NL7900464A (nl)	1979-07-24	Koppeling.
NL7901593A (nl)	1979-09-05	Broeikas.
NL7901066A (nl)	1979-08-21	Microtelefoon.
NL7711689A (nl)	1978-05-03	Vervormingscompensatieketen.
NL175684C (nl)	1984-12-03	Meegekoppelde versterkerketen.
NL190301C (nl)	1994-01-03	Selectieve versterker.
NL189276C (nl)	1993-02-16	Geregelde afbuigketen.
NL191386C (nl)	1995-07-03	Een 16-hydroxy-prostaglandine verbinding.
NL7900680A (nl)	1979-08-03	Versterker met een aantal trappen.
NL7704908A (nl)	1977-11-08	Vervormingscompensatieketen.
NL177459C (nl)	1985-09-16	Abonneelijnketen omvattende een symmetrische versterker.
NL174896B (nl)	1984-03-16	Versterkingsketen.
IT7920792A0 (it)	1979-03-06	Amplificatore a transistori.
NL7805338A (nl)	1978-11-21	Meertrapsversterkerketen.
IT7819343A0 (it)	1978-01-18	Segreteria telefonica.
IT8020406A0 (it)	1980-03-07	Amplificatore a reazione.
NL170211C (nl)	1982-10-01	Versterkerketen.
NL7901067A (nl)	1979-08-21	Microtelefoon.
IT7919775A0 (it)	1979-02-01	Amplificatore a ponte.
NL7702008A (nl)	1977-08-29	Versterkerketen.
NL7903030A (nl)	1979-10-22	Versterker.
NL7613569A (nl)	1977-06-10	Telefoonketen.

Legal Events

Date	Code	Title
1979-10-25	A1A	A request for search or an international-type search has been filed
1980-03-25	BB	A search report has been drawn up
1980-07-25	BT	A document has been added to the application laid open to public inspection
1981-01-26	BC	A request for examination has been filed
1985-01-01	A85	Still pending on 85-01-01
1985-10-01	BA	A request for search or an international-type search has been filed
1985-10-01	BB	A search report has been drawn up
1986-01-02	BC	A request for examination has been filed
1988-11-16	V1	Lapsed because of non-payment of the annual fee