NO134855B - - Google Patents

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Publication number
NO134855B
NO134855B NO750717A NO750717A NO134855B NO 134855 B NO134855 B NO 134855B NO 750717 A NO750717 A NO 750717A NO 750717 A NO750717 A NO 750717A NO 134855 B NO134855 B NO 134855B
Authority
NO
Norway
Prior art keywords
amplifier
bridge
impedance
line
speech circuit
Prior art date
Application number
NO750717A
Other languages
English (en)
Norwegian (no)
Other versions
NO750717L (de
NO134855C (de
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.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of NO750717L publication Critical patent/NO750717L/no
Publication of NO134855B publication Critical patent/NO134855B/no
Publication of NO134855C publication Critical patent/NO134855C/no

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)
NO750717A 1974-03-05 1975-03-04 NO134855C (de)

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 (3)

Publication Number Publication Date
NO750717L NO750717L (de) 1975-09-08
NO134855B true NO134855B (de) 1976-09-13
NO134855C NO134855C (de) 1976-12-29

Family

ID=20320413

Family Applications (1)

Application Number Title Priority Date Filing Date
NO750717A NO134855C (de) 1974-03-05 1975-03-04

Country Status (12)

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

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

Also Published As

Publication number Publication date
GB1493869A (en) 1977-11-30
ES435269A1 (es) 1976-12-16
NO750717L (de) 1975-09-08
NL7502112A (nl) 1975-09-09
FR2263648A1 (de) 1975-10-03
SE380699B (sv) 1975-11-10
US3974344A (en) 1976-08-10
FI750378A (de) 1975-09-06
BR7501102A (pt) 1975-12-02
DK86475A (de) 1975-11-03
CA1011479A (en) 1977-05-31
DK139600C (de) 1979-08-27
DK139600B (da) 1979-03-12
SE7402901L (de) 1975-09-08
IT1033427B (it) 1979-07-10
NO134855C (de) 1976-12-29
FR2263648B1 (de) 1979-03-02

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