DK139600B - Elektronisk talekredsløb til et centralbatteriforsynet telefonapparat. - Google Patents

Elektronisk talekredsløb til et centralbatteriforsynet telefonapparat.

Info

Publication number
DK139600B
DK139600B DK86475AA DK86475A DK139600B DK 139600 B DK139600 B DK 139600B DK 86475A A DK86475A A DK 86475AA DK 86475 A DK86475 A DK 86475A DK 139600 B DK139600 B DK 139600B
Authority
DK
Denmark
Prior art keywords
telephone set
electronic voice
central battery
operated telephone
voice circuitry
Prior art date
Application number
DK86475AA
Other languages
Danish (da)
English (en)
Other versions
DK139600C (pm
DK86475A (pm
Inventor
Lazzlo 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 DK86475A publication Critical patent/DK86475A/da
Publication of DK139600B publication Critical patent/DK139600B/da
Application granted granted Critical
Publication of DK139600C publication Critical patent/DK139600C/da

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)
DK86475AA 1974-03-05 1975-03-04 Elektronisk talekredsløb til et centralbatteriforsynet telefonapparat. DK139600B (da)

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
DK86475A DK86475A (pm) 1975-11-03
DK139600B true DK139600B (da) 1979-03-12
DK139600C DK139600C (pm) 1979-08-27

Family

ID=20320413

Family Applications (1)

Application Number Title Priority Date Filing Date
DK86475AA DK139600B (da) 1974-03-05 1975-03-04 Elektronisk talekredsløb til et centralbatteriforsynet telefonapparat.

Country Status (12)

Country Link
US (1) US3974344A (pm)
BR (1) BR7501102A (pm)
CA (1) CA1011479A (pm)
DK (1) DK139600B (pm)
ES (1) ES435269A1 (pm)
FI (1) FI750378A7 (pm)
FR (1) FR2263648B1 (pm)
GB (1) GB1493869A (pm)
IT (1) IT1033427B (pm)
NL (1) NL7502112A (pm)
NO (1) NO134855C (pm)
SE (1) SE380699B (pm)

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

Also Published As

Publication number Publication date
SE380699B (sv) 1975-11-10
NO134855C (pm) 1976-12-29
FR2263648A1 (pm) 1975-10-03
DK139600C (pm) 1979-08-27
US3974344A (en) 1976-08-10
ES435269A1 (es) 1976-12-16
NL7502112A (nl) 1975-09-09
IT1033427B (it) 1979-07-10
GB1493869A (en) 1977-11-30
FR2263648B1 (pm) 1979-03-02
CA1011479A (en) 1977-05-31
DK86475A (pm) 1975-11-03
FI750378A7 (pm) 1975-09-06
NO750717L (pm) 1975-09-08
NO134855B (pm) 1976-09-13
BR7501102A (pt) 1975-12-02
SE7402901L (pm) 1975-09-08

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