BR7501102A - Circuito telefonico eletronico para um aparelho telefonico a bateria central - Google Patents

Circuito telefonico eletronico para um aparelho telefonico a bateria central

Info

Publication number
BR7501102A
BR7501102A BR1102/75A BR7501102A BR7501102A BR 7501102 A BR7501102 A BR 7501102A BR 1102/75 A BR1102/75 A BR 1102/75A BR 7501102 A BR7501102 A BR 7501102A BR 7501102 A BR7501102 A BR 7501102A
Authority
BR
Brazil
Prior art keywords
telephone
central battery
electronic
circuit
telephone circuit
Prior art date
Application number
BR1102/75A
Other languages
English (en)
Portuguese (pt)
Inventor
Mersich Lazzlo
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 BR7501102A publication Critical patent/BR7501102A/pt

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)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BR1102/75A 1974-03-05 1975-02-24 Circuito telefonico eletronico para um aparelho telefonico a bateria central BR7501102A (pt)

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 (1)

Publication Number Publication Date
BR7501102A true BR7501102A (pt) 1975-12-02

Family

ID=20320413

Family Applications (1)

Application Number Title Priority Date Filing Date
BR1102/75A BR7501102A (pt) 1974-03-05 1975-02-24 Circuito telefonico eletronico para um aparelho telefonico a bateria central

Country Status (12)

Country Link
US (1) US3974344A (US08124317-20120228-C00038.png)
BR (1) BR7501102A (US08124317-20120228-C00038.png)
CA (1) CA1011479A (US08124317-20120228-C00038.png)
DK (1) DK139600B (US08124317-20120228-C00038.png)
ES (1) ES435269A1 (US08124317-20120228-C00038.png)
FI (1) FI750378A (US08124317-20120228-C00038.png)
FR (1) FR2263648B1 (US08124317-20120228-C00038.png)
GB (1) GB1493869A (US08124317-20120228-C00038.png)
IT (1) IT1033427B (US08124317-20120228-C00038.png)
NL (1) NL7502112A (US08124317-20120228-C00038.png)
NO (1) NO134855C (US08124317-20120228-C00038.png)
SE (1) SE380699B (US08124317-20120228-C00038.png)

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 (US08124317-20120228-C00038.png) * 1970-09-03 1976-12-18

Also Published As

Publication number Publication date
NO134855C (US08124317-20120228-C00038.png) 1976-12-29
DK86475A (US08124317-20120228-C00038.png) 1975-11-03
ES435269A1 (es) 1976-12-16
FI750378A (US08124317-20120228-C00038.png) 1975-09-06
IT1033427B (it) 1979-07-10
CA1011479A (en) 1977-05-31
SE7402901L (US08124317-20120228-C00038.png) 1975-09-08
DK139600B (da) 1979-03-12
SE380699B (sv) 1975-11-10
NL7502112A (nl) 1975-09-09
DK139600C (US08124317-20120228-C00038.png) 1979-08-27
FR2263648A1 (US08124317-20120228-C00038.png) 1975-10-03
GB1493869A (en) 1977-11-30
NO134855B (US08124317-20120228-C00038.png) 1976-09-13
US3974344A (en) 1976-08-10
FR2263648B1 (US08124317-20120228-C00038.png) 1979-03-02
NO750717L (US08124317-20120228-C00038.png) 1975-09-08

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