NO780077L - Elektronisk anordning for telefonapparat - Google Patents

Elektronisk anordning for telefonapparat

Info

Publication number: NO780077L
Authority: NO; Norway
Prior art keywords: line; capacitor; voltage; resistor; input
Prior art date: 1977-01-10

Application number

NO780077A

Other languages

English (en)

Norwegian (no)

Inventor

Arthur David Moore

Original Assignee

Northern Telecom Ltd

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.)

1977-01-10

Filing date

1978-01-09

Publication date

1978-07-11

1978-01-09 Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd

1978-07-11 Publication of NO780077L publication Critical patent/NO780077L/no

Links

239000003990 capacitor Substances 0.000 claims description 25
230000005540 biological transmission Effects 0.000 claims description 10
238000002161 passivation Methods 0.000 claims description 2
230000011664 signaling Effects 0.000 description 7
230000006978 adaptation Effects 0.000 description 4
230000008859 change Effects 0.000 description 4
230000000694 effects Effects 0.000 description 3
238000002955 isolation Methods 0.000 description 3
238000006243 chemical reaction Methods 0.000 description 1
230000008094 contradictory effect Effects 0.000 description 1
230000008878 coupling Effects 0.000 description 1
238000010168 coupling process Methods 0.000 description 1
238000005859 coupling reaction Methods 0.000 description 1
238000010586 diagram Methods 0.000 description 1
238000001914 filtration Methods 0.000 description 1
230000006872 improvement Effects 0.000 description 1
230000035484 reaction time Effects 0.000 description 1
230000009467 reduction Effects 0.000 description 1
230000001105 regulatory effect Effects 0.000 description 1
230000004044 response Effects 0.000 description 1
239000002689 soil Substances 0.000 description 1

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Interface Circuits In Exchanges (AREA)
Devices For Supply Of Signal Current (AREA)
Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Developing Agents For Electrophotography (AREA)
Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

NO780077A 1977-01-10 1978-01-09 Elektronisk anordning for telefonapparat NO780077L (no)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA269,418A CA1056970A (en)	1977-01-10	1977-01-10	Electronic network for telephone set

Publications (1)

Publication Number	Publication Date
NO780077L true NO780077L (no)	1978-07-11

Family

ID=4107699

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO780077A NO780077L (no)	1977-01-10	1978-01-09	Elektronisk anordning for telefonapparat

Country Status (13)

Country	Link
US (1)	US4133983A (da)
JP (1)	JPS5387604A (da)
CA (1)	CA1056970A (da)
DE (1)	DE2800875A1 (da)
DK (1)	DK9278A (da)
ES (1)	ES465856A1 (da)
FI (1)	FI773962A7 (da)
FR (1)	FR2377125A1 (da)
GB (1)	GB1543300A (da)
IT (1)	IT1089420B (da)
NL (1)	NL7714174A (da)
NO (1)	NO780077L (da)
SE (1)	SE414444B (da)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2906084C2 (de) *	1979-02-15	1981-10-08	Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin	Schaltungsanordnung zur Übertragung von sprachfrequenten Signalen in Fernsprechanlagen
US4354060A (en) *	1979-07-26	1982-10-12	Stromberg-Carlson Corporation	Electronic telephone
DE2946306C2 (de) *	1979-11-16	1987-02-26	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Verstärkerschaltung mit vorgebbarem Wechselstrominnenwiderstand
US4332984A (en) *	1979-12-13	1982-06-01	Bell Telephone Laboratories, Incorporated	Active speech network circuit for a telephone set
FR2487611B1 (fr) *	1980-07-22	1987-10-30	Telephonie Ind Commerciale	Circuit d'interface de clavier a frequences vocales
IL63653A (en) *	1980-08-29	1984-05-31	Western Electric Co	Line powered transformer-less loudspeaking telephone
US4488006A (en) *	1982-07-01	1984-12-11	At&T Bell Laboratories	Apparatus for controlling the application of telephone line power in a telephone set

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3462560A (en) *	1966-04-06	1969-08-19	Bell Telephone Labor Inc	Subscriber telephone circuit with resistance hybrid sidetone balancing network
BE759917A (fr) *	1969-12-08	1971-05-17	Western Electric Co	Reseau a frequence acoustique
US3691311A (en) *	1970-12-10	1972-09-12	Pacific Plantronics Inc	Telephone user set
GB1406663A (en) *	1972-08-22	1975-09-17	Standard Telephones Cables Ltd	Telphone subset circuits
IT1024530B (it) *	1974-03-21	1978-07-20	Sits Soc It Telecom Siemens	Circuito telefonico amplificato senza trasformatore
US3899646A (en) *	1974-05-28	1975-08-12	Bell Telephone Labor Inc	Telephone set speech network
SE384775B (sv) *	1974-12-04	1976-05-17	Ericsson Telefon Ab L M	Integrerad forsterkare
US3963876A (en) *	1975-06-30	1976-06-15	Bell Telephone Laboratories, Incorporated	Amplifier circuit for increasing transmit and receive levels in a telephone hybrid network
US4071713A (en) *	1976-12-27	1978-01-31	Northern Telecom Limited	Telephone speech network

1977
- 1977-01-10 CA CA269,418A patent/CA1056970A/en not_active Expired
- 1977-12-15 GB GB52282/77A patent/GB1543300A/en not_active Expired
- 1977-12-21 NL NL7714174A patent/NL7714174A/xx not_active Application Discontinuation
- 1977-12-28 FR FR7739532A patent/FR2377125A1/fr not_active Withdrawn
- 1977-12-28 IT IT31362/77A patent/IT1089420B/it active
- 1977-12-29 FI FI773962A patent/FI773962A7/fi not_active Application Discontinuation
1978
- 1978-01-06 US US05/867,438 patent/US4133983A/en not_active Expired - Lifetime
- 1978-01-09 SE SE7800212A patent/SE414444B/sv unknown
- 1978-01-09 NO NO780077A patent/NO780077L/no unknown
- 1978-01-09 DK DK9278A patent/DK9278A/da unknown
- 1978-01-09 JP JP60878A patent/JPS5387604A/ja active Pending
- 1978-01-10 DE DE19782800875 patent/DE2800875A1/de not_active Withdrawn
- 1978-01-10 ES ES465856A patent/ES465856A1/es not_active Expired

Also Published As

Publication number	Publication date
ES465856A1 (es)	1978-10-01
SE414444B (sv)	1980-07-28
CA1056970A (en)	1979-06-19
DK9278A (da)	1978-07-11
FI773962A7 (fi)	1978-07-11
JPS5387604A (en)	1978-08-02
US4133983A (en)	1979-01-09
NL7714174A (nl)	1978-07-12
IT1089420B (it)	1985-06-18
GB1543300A (en)	1979-04-04
SE7800212L (sv)	1978-07-11
DE2800875A1 (de)	1978-07-13
FR2377125A1 (fr)	1978-08-04

Publication	Publication Date	Title
JP2830319B2 (ja)	1998-12-02	送受信切り換え装置
US4457014A (en)	1984-06-26	Signal transfer and system utilizing transmission lines
US3046354A (en)	1962-07-24	Loud speaking telephone
US4007335A (en)	1977-02-08	Telephone line battery feed circuit
JPS5853556B2 (ja)	1983-11-30	電話ライン回路用増幅回路
NO774415L (no)	1978-06-28	Telefonsystem.
US3963876A (en)	1976-06-15	Amplifier circuit for increasing transmit and receive levels in a telephone hybrid network
US3028452A (en)	1962-04-03	Loudspeaking telephone using transistors
NO780077L (no)	1978-07-11	Elektronisk anordning for telefonapparat
US4354060A (en)	1982-10-12	Electronic telephone
US4539438A (en)	1985-09-03	Active impedance transformer assisted line feed circuit with supervision filtering
US3546395A (en)	1970-12-08	Active telephone set speech network employing transistor feedback loop for sidetone balance and equalization
US2801287A (en)	1957-07-30	Control of regular and distant talking subscribers sets
US3691311A (en)	1972-09-12	Telephone user set
US3919487A (en)	1975-11-11	Telephone instrument disconnect circuit
JPH04315308A (ja)	1992-11-06	電流シンク
US3706852A (en)	1972-12-19	Quiet turn-on circuit for carbon microphones
US4297536A (en)	1981-10-27	Self-adjusting hybrid network
US4440979A (en)	1984-04-03	Current sink for DPT channel unit
US4112262A (en)	1978-09-05	Telephone station repeater
US5504807A (en)	1996-04-02	Telephone apparatus with a continuously-connected DC-isolated modem
EP1230733B1 (en)	2008-10-08	Adsl filter
JP4413302B2 (ja)	2010-02-10	ハイブリッド増幅器
US3783195A (en)	1974-01-01	Plant telephone communication system
NO134855B (da)	1976-09-13