FR2263648B1 - - Google Patents

Info

Publication number
FR2263648B1
FR2263648B1 FR7506668A FR7506668A FR2263648B1 FR 2263648 B1 FR2263648 B1 FR 2263648B1 FR 7506668 A FR7506668 A FR 7506668A FR 7506668 A FR7506668 A FR 7506668A FR 2263648 B1 FR2263648 B1 FR 2263648B1
Authority
FR
France
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.)
Expired
Application number
FR7506668A
Other versions
FR2263648A1 (fr
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of FR2263648A1 publication Critical patent/FR2263648A1/fr
Application granted granted Critical
Publication of FR2263648B1 publication Critical patent/FR2263648B1/fr
Expired legal-status Critical Current

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)
FR7506668A 1974-03-05 1975-03-04 Expired FR2263648B1 (fr)

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
FR2263648A1 FR2263648A1 (fr) 1975-10-03
FR2263648B1 true FR2263648B1 (fr) 1979-03-02

Family

ID=20320413

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7506668A Expired FR2263648B1 (fr) 1974-03-05 1975-03-04

Country Status (12)

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

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 (fr) * 1970-09-03 1976-12-18

Also Published As

Publication number Publication date
NO134855B (fr) 1976-09-13
GB1493869A (en) 1977-11-30
NO750717L (fr) 1975-09-08
IT1033427B (it) 1979-07-10
ES435269A1 (es) 1976-12-16
BR7501102A (pt) 1975-12-02
DK139600B (da) 1979-03-12
NL7502112A (nl) 1975-09-09
CA1011479A (en) 1977-05-31
NO134855C (fr) 1976-12-29
US3974344A (en) 1976-08-10
SE7402901L (fr) 1975-09-08
FR2263648A1 (fr) 1975-10-03
DK139600C (fr) 1979-08-27
DK86475A (fr) 1975-11-03
SE380699B (sv) 1975-11-10
FI750378A (fr) 1975-09-06

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Legal Events

Date Code Title Description
ST Notification of lapse