SE7402901L - - Google Patents

Info

Publication number: SE7402901L
Authority: SE; Sweden

Application number

SE7402901A

Other versions

SE380699B (sv

Inventor

L Mersich

Original Assignee

Ericsson Telefon Ab L M

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.)

1974-03-05

Filing date

1974-03-05

Publication date

1975-09-08

1974-03-05 Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M

1974-03-05 Priority to SE7402901A priority Critical patent/SE380699B/xx

1975-02-12 Priority to FI750378A priority patent/FI750378A/fi

1975-02-13 Priority to US05/549,664 priority patent/US3974344A/en

1975-02-19 Priority to GB7081/75A priority patent/GB1493869A/en

1975-02-21 Priority to NL7502112A priority patent/NL7502112A/xx

1975-02-24 Priority to BR1102/75A priority patent/BR7501102A/pt

1975-03-04 Priority to DK86475AA priority patent/DK139600B/da

1975-03-04 Priority to NO750717A priority patent/NO134855C/no

1975-03-04 Priority to ES435269A priority patent/ES435269A1/es

1975-03-04 Priority to FR7506668A priority patent/FR2263648B1/fr

1975-03-05 Priority to IT20931/75A priority patent/IT1033427B/it

1975-03-05 Priority to CA221,338A priority patent/CA1011479A/en

1975-09-08 Publication of SE7402901L publication Critical patent/SE7402901L/xx

1975-11-10 Publication of SE380699B publication Critical patent/SE380699B/xx

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
- H04M1/585—Anti-side-tone circuits implemented without inductive element
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Amplifiers (AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Interface Circuits In Exchanges (AREA)

SE7402901A 1974-03-05 1974-03-05 Elektronisk talkrets for en centralbatterimatad telefonapparat. SE380699B (sv)

Priority Applications (12)

Application Number	Priority Date	Filing Date	Title
SE7402901A SE380699B (sv)	1974-03-05	1974-03-05	Elektronisk talkrets for en centralbatterimatad telefonapparat.
FI750378A FI750378A (it)	1974-03-05	1975-02-12
US05/549,664 US3974344A (en)	1974-03-05	1975-02-13	Electronic speech circuit for a central battery telephone set
GB7081/75A GB1493869A (en)	1974-03-05	1975-02-19	Circuit arrangements including amplifiers
NL7502112A NL7502112A (nl)	1974-03-05	1975-02-21	Electronische spreekketen voor een telefoon- toestel voor centrale batterijvoeding.
BR1102/75A BR7501102A (pt)	1974-03-05	1975-02-24	Circuito telefonico eletronico para um aparelho telefonico a bateria central
DK86475AA DK139600B (da)	1974-03-05	1975-03-04	Elektronisk talekredsløb til et centralbatteriforsynet telefonapparat.
NO750717A NO134855C (it)	1974-03-05	1975-03-04
ES435269A ES435269A1 (es)	1974-03-05	1975-03-04	Disposicion de circuito de conversacion electronico para unequipo telefonico.
FR7506668A FR2263648B1 (it)	1974-03-05	1975-03-04
IT20931/75A IT1033427B (it)	1974-03-05	1975-03-05	Circuito elettronico vocale per un apparecchio telefonico centrale a batteria
CA221,338A CA1011479A (en)	1974-03-05	1975-03-05	Electronic speech circuit for a central battery telephone set

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
SE7402901A SE380699B (sv)	1974-03-05	1974-03-05	Elektronisk talkrets for en centralbatterimatad telefonapparat.

Publications (2)

Publication Number	Publication Date
SE7402901L true SE7402901L (it)	1975-09-08
SE380699B SE380699B (sv)	1975-11-10

Family

ID=20320413

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7402901A SE380699B (sv)	1974-03-05	1974-03-05	Elektronisk talkrets for en centralbatterimatad telefonapparat.

Country Status (12)

Country	Link
US (1)	US3974344A (it)
BR (1)	BR7501102A (it)
CA (1)	CA1011479A (it)
DK (1)	DK139600B (it)
ES (1)	ES435269A1 (it)
FI (1)	FI750378A (it)
FR (1)	FR2263648B1 (it)
GB (1)	GB1493869A (it)
IT (1)	IT1033427B (it)
NL (1)	NL7502112A (it)
NO (1)	NO134855C (it)
SE (1)	SE380699B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1546046A (en) *	1976-12-03	1979-05-16	Cselt Centro Studi Lab Telecom	Transmitting and receiving circuit for subscriber telephone sets
US4163878A (en) *	1977-09-07	1979-08-07	Wescom, Inc.	Electronic hybrid and hybrid repeater with bridge circuit
US4192978A (en) *	1978-02-27	1980-03-11	Vincent Ogden W	Operational amplifier hybrid system
US4718083A (en) *	1985-09-23	1988-01-05	Gte Communication Systems Corporation	Differential receive booster amplifier for telephone instruments
JP2734265B2 (ja) *	1991-12-12	1998-03-30	日本電気株式会社	エレクトレット・コンデンサ・マイクロフォン用増幅回路

Family Cites Families (3)

* 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
DE1919111B1 (de) *	1969-04-15	1970-10-29	Siemens Ag	Schaltungsanordnung fuer einen Transistorhoerverstaerker mit Daempfungsausgleich in Fernsprechteilnehmerstellen
JPS5148006B1 (it) *	1970-09-03	1976-12-18

1974
- 1974-03-05 SE SE7402901A patent/SE380699B/xx unknown
1975
- 1975-02-12 FI FI750378A patent/FI750378A/fi not_active Application Discontinuation
- 1975-02-13 US US05/549,664 patent/US3974344A/en not_active Expired - Lifetime
- 1975-02-19 GB GB7081/75A patent/GB1493869A/en not_active Expired
- 1975-02-21 NL NL7502112A patent/NL7502112A/xx not_active Application Discontinuation
- 1975-02-24 BR BR1102/75A patent/BR7501102A/pt unknown
- 1975-03-04 ES ES435269A patent/ES435269A1/es not_active Expired
- 1975-03-04 DK DK86475AA patent/DK139600B/da unknown
- 1975-03-04 NO NO750717A patent/NO134855C/no unknown
- 1975-03-04 FR FR7506668A patent/FR2263648B1/fr not_active Expired
- 1975-03-05 CA CA221,338A patent/CA1011479A/en not_active Expired
- 1975-03-05 IT IT20931/75A patent/IT1033427B/it active

Also Published As

Publication number	Publication date
SE380699B (sv)	1975-11-10
DK86475A (it)	1975-11-03
GB1493869A (en)	1977-11-30
DK139600C (it)	1979-08-27
NO134855C (it)	1976-12-29
ES435269A1 (es)	1976-12-16
FR2263648B1 (it)	1979-03-02
DK139600B (da)	1979-03-12
NO750717L (it)	1975-09-08
US3974344A (en)	1976-08-10
NO134855B (it)	1976-09-13
NL7502112A (nl)	1975-09-09
IT1033427B (it)	1979-07-10
BR7501102A (pt)	1975-12-02
FI750378A (it)	1975-09-06
CA1011479A (en)	1977-05-31
FR2263648A1 (it)	1975-10-03

Publication	Publication Date	Title
FR2257987A1 (it)	1975-08-08
DK86475A (it)	1975-11-03
BG19682A1 (it)	1975-10-10
BG19713A1 (it)	1975-10-10
BG19746A1 (it)	1975-10-10
BG20244A1 (it)	1975-11-05
BG20501A1 (it)	1975-12-05
BG20746A1 (it)	1975-12-20
BG20884A1 (it)	1976-01-20
AU482019A (it)	1976-01-08
BG21312A1 (it)	1976-05-20
BG21623A1 (it)	1976-09-20
BG21710A1 (it)	1976-09-20
BG22303A1 (it)	1977-02-20
BG22518A1 (it)	1977-04-20
CH1340175A4 (it)	1977-06-30
CH1446574A4 (it)	1977-02-15
CH231275A4 (it)	1976-05-31
CH238674A4 (it)	1976-02-13
CH563833A5 (it)	1975-07-15
CH566532A5 (it)	1975-09-15
CH569333A5 (it)	1975-11-14
CH570549A5 (it)	1975-12-15
CH571710A5 (it)	1976-01-15
CH572263A5 (it)	1976-01-30