CA930883A - Telephone circuits - Google Patents

Telephone circuits

Info

Publication number
CA930883A
CA930883A CA116841A CA116841A CA930883A CA 930883 A CA930883 A CA 930883A CA 116841 A CA116841 A CA 116841A CA 116841 A CA116841 A CA 116841A CA 930883 A CA930883 A CA 930883A
Authority
CA
Canada
Prior art keywords
telephone circuits
telephone
circuits
Prior art date
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
CA116841A
Other languages
English (en)
Other versions
CA116841S (en
Inventor
Matsuda Ryoichi
Terai Masaaki
Hojyo Yasuo
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Application granted granted Critical
Publication of CA930883A publication Critical patent/CA930883A/en
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
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
CA116841A 1970-09-03 1971-06-28 Telephone circuits Expired CA930883A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45076677A JPS5148006B1 (it) 1970-09-03 1970-09-03

Publications (1)

Publication Number Publication Date
CA930883A true CA930883A (en) 1973-07-24

Family

ID=13612045

Family Applications (1)

Application Number Title Priority Date Filing Date
CA116841A Expired CA930883A (en) 1970-09-03 1971-06-28 Telephone circuits

Country Status (6)

Country Link
US (1) US3742153A (it)
JP (1) JPS5148006B1 (it)
CA (1) CA930883A (it)
DE (1) DE2133401B2 (it)
GB (1) GB1330117A (it)
SE (1) SE373253B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49123706A (it) * 1973-03-30 1974-11-27
SE380699B (sv) * 1974-03-05 1975-11-10 Ericsson Telefon Ab L M Elektronisk talkrets for en centralbatterimatad telefonapparat.
GB1546046A (en) * 1976-12-03 1979-05-16 Cselt Centro Studi Lab Telecom Transmitting and receiving circuit for subscriber telephone sets
US5058155A (en) * 1989-12-01 1991-10-15 Gn Netcom A/S Multipurpose headset amplifier
WO2002095945A2 (en) * 2001-05-21 2002-11-28 Vasily Grigorievich Atyunin Method and apparatus for impedance matching in a transmission

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818470A (en) * 1956-03-29 1957-12-31 Bell Telephone Labor Inc Compensated transistor circuit
BE621155A (it) * 1961-08-07
US3170043A (en) * 1961-09-29 1965-02-16 Bell Telephone Labor Inc Telephone anti-sidetone circuit
US3546395A (en) * 1968-01-15 1970-12-08 Bell Telephone Labor Inc Active telephone set speech network employing transistor feedback loop for sidetone balance and equalization
SE334921B (it) * 1968-01-18 1971-05-10 O Sternbeck
DE1762804B2 (de) * 1968-08-29 1972-01-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zur regelung der sende und empfangsbezugs daempfung einer teilnehmerstation einer fernsprechanlage

Also Published As

Publication number Publication date
DE2133401B2 (de) 1973-02-22
DE2133401A1 (de) 1972-03-16
JPS5148006B1 (it) 1976-12-18
US3742153A (en) 1973-06-26
SE373253B (it) 1975-01-27
GB1330117A (en) 1973-09-12

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