SE402848B - Sendnings- och mottagningsapparatur - Google Patents

Sendnings- och mottagningsapparatur

Info

Publication number
SE402848B
SE402848B SE7503851A SE7503851A SE402848B SE 402848 B SE402848 B SE 402848B SE 7503851 A SE7503851 A SE 7503851A SE 7503851 A SE7503851 A SE 7503851A SE 402848 B SE402848 B SE 402848B
Authority
SE
Sweden
Prior art keywords
transmission
reception equipment
reception
equipment
Prior art date
Application number
SE7503851A
Other languages
English (en)
Swedish (sv)
Other versions
SE7503851L (sv
Inventor
M Terai
K Kakehi
R Matsuda
G Ito
Original Assignee
Nippon Telegraph & Telephone
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 & Telephone filed Critical Nippon Telegraph & Telephone
Publication of SE7503851L publication Critical patent/SE7503851L/xx
Publication of SE402848B publication Critical patent/SE402848B/xx

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephone Function (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
SE7503851A 1974-04-04 1975-04-03 Sendnings- och mottagningsapparatur SE402848B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49037326A JPS50131705A (cg-RX-API-DMAC7.html) 1974-04-04 1974-04-04

Publications (2)

Publication Number Publication Date
SE7503851L SE7503851L (sv) 1975-10-06
SE402848B true SE402848B (sv) 1978-07-17

Family

ID=12494516

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7503851A SE402848B (sv) 1974-04-04 1975-04-03 Sendnings- och mottagningsapparatur

Country Status (6)

Country Link
US (1) US4002860A (cg-RX-API-DMAC7.html)
JP (1) JPS50131705A (cg-RX-API-DMAC7.html)
CA (1) CA1026027A (cg-RX-API-DMAC7.html)
DE (1) DE2514845A1 (cg-RX-API-DMAC7.html)
GB (1) GB1507343A (cg-RX-API-DMAC7.html)
SE (1) SE402848B (cg-RX-API-DMAC7.html)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115658A (en) * 1977-04-11 1978-09-19 Williams Richard W Two way telephone amplifier
DE2913244C2 (de) * 1979-04-03 1981-07-02 Krone Gmbh, 1000 Berlin Taktgesteuerte Gegensprecheinrichtung zur Vermeidung akustischer Rückkopplung mit einem oder mehreren Schallwandlern
US4251689A (en) * 1979-07-09 1981-02-17 Canadian Patents & Dev. Ltd. Loudspeaker telephone apparatus
US7072476B2 (en) * 1997-02-18 2006-07-04 Matech, Inc. Audio headset
US5907538A (en) 1997-02-18 1999-05-25 White; Donald R. Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input
US6298046B1 (en) * 1998-08-28 2001-10-02 Rc Networks Adjustable balancing circuit for an adaptive hybrid and method of adjusting the same
US7826805B2 (en) * 2003-11-11 2010-11-02 Matech, Inc. Automatic-switching wireless communication device
KR100851286B1 (ko) * 2003-11-11 2008-08-08 마테크, 인코포레이티드 단일 트랜스듀서를 갖는 쌍방향 통신 장치
US8315379B2 (en) * 2004-11-10 2012-11-20 Matech, Inc. Single transducer full duplex talking circuit
JP5009913B2 (ja) * 2006-07-27 2012-08-29 株式会社Ｓ＆Ｓエンジニアリング 自走台車の水平搬送機構
DK2389774T3 (en) * 2009-01-23 2015-01-19 Widex As System, method and hearing aids for in situ okklusionseffektmåling
JP5607824B2 (ja) * 2010-07-05 2014-10-15 ヴェーデクス・アクティーセルスカプ 補聴器ユーザの閉塞効果を計測しかつ確認するシステムおよび方法
DE102017105594A1 (de) * 2017-03-16 2018-09-20 USound GmbH Verstärkereinheit für einen Schallwandler und Schallerzeugungseinheit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282465A (en) * 1941-02-27 1942-05-12 Bell Telephone Labor Inc Speech transmission system
US2535063A (en) * 1945-05-03 1950-12-26 Farnsworth Res Corp Communicating system
NL190604A (cg-RX-API-DMAC7.html) * 1953-09-11
US3178648A (en) * 1962-06-18 1965-04-13 De Loss J Tanner Transistorized amplifier utilizing an input transformer bootstrap configuration
US3889058A (en) * 1969-01-15 1975-06-10 Ard Anstalt Telephone systems with reduced acoustic feedback
US3784755A (en) * 1971-09-07 1974-01-08 Bell Canada Northern Electric Long-line telephone circuit
JPS5233963B2 (cg-RX-API-DMAC7.html) * 1971-09-28 1977-08-31
US3753786A (en) * 1972-03-29 1973-08-21 Gould Inc Method and apparatus for adjusting battery electrolyte concentration
JPS5226972B2 (cg-RX-API-DMAC7.html) * 1973-07-28 1977-07-18

Also Published As

Publication number Publication date
US4002860A (en) 1977-01-11
DE2514845A1 (de) 1975-10-09
GB1507343A (en) 1978-04-12
SE7503851L (sv) 1975-10-06
CA1026027A (en) 1978-02-07
JPS50131705A (cg-RX-API-DMAC7.html) 1975-10-18

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