GB1440340A - Level-control arrangements - Google Patents

Level-control arrangements

Info

Publication number
GB1440340A
GB1440340A GB5868073A GB5868073A GB1440340A GB 1440340 A GB1440340 A GB 1440340A GB 5868073 A GB5868073 A GB 5868073A GB 5868073 A GB5868073 A GB 5868073A GB 1440340 A GB1440340 A GB 1440340A
Authority
GB
United Kingdom
Prior art keywords
level
control arrangements
arrangements
control
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
GB5868073A
Other languages
English (en)
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1440340A publication Critical patent/GB1440340A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
    • 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)
  • Control Of Amplification And Gain Control (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
GB5868073A 1972-12-18 1973-12-18 Level-control arrangements Expired GB1440340A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16533/72A SE365375B (enExample) 1972-12-18 1972-12-18

Publications (1)

Publication Number Publication Date
GB1440340A true GB1440340A (en) 1976-06-23

Family

ID=20302394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5868073A Expired GB1440340A (en) 1972-12-18 1973-12-18 Level-control arrangements

Country Status (9)

Country Link
US (1) US3902023A (enExample)
JP (1) JPS4991104A (enExample)
CA (1) CA993582A (enExample)
ES (1) ES421458A1 (enExample)
FR (1) FR2210872B1 (enExample)
GB (1) GB1440340A (enExample)
IT (1) IT1002335B (enExample)
NL (1) NL7316587A (enExample)
SE (1) SE365375B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174578A (en) * 1985-05-04 1986-11-05 Stc Plc Loudspeaking telephone

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242643B2 (enExample) * 1973-10-18 1977-10-26
US4002852A (en) * 1975-07-08 1977-01-11 International Telephone And Telegraph Corporation Electronic telephone network
FR2404355A1 (fr) * 1977-09-21 1979-04-20 Phoninter Sa Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone
FR2500698B1 (fr) * 1981-02-20 1989-02-17 Thomson Csf Mat Tel Dispositif anti-effet larsen pour poste telephonique
CA1186826A (en) * 1981-03-18 1985-05-07 Jin H. Yun Loudspeaker telephone system
DE3148305A1 (de) * 1981-12-03 1983-06-09 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung fuer eine freisprecheinrichtung
FR2593824B1 (fr) * 1986-02-03 1988-11-04 Inst Francais Du Petrole Procede de reformage catalytique a travers au moins trois lits de catalyseur
DE3629596A1 (de) * 1986-08-30 1988-03-03 Standard Elektrik Lorenz Ag Schaltungsanordnung zur entkopplung der uebertragungszweige einer freisprecheinrichtung
US4720856A (en) * 1986-09-02 1988-01-19 Motorola, Inc. Control circuit having a direct current control loop for controlling the gain of an attenuator
JPH06338934A (ja) * 1993-05-25 1994-12-06 Exar Corp 事象駆動型制御回路を有するスピーカーホーン
US5530767A (en) * 1993-12-28 1996-06-25 Nec Corporation Reception volume limiting circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267461A (enExample) * 1960-10-04 1900-01-01
US3395255A (en) * 1964-07-01 1968-07-30 Bell Telephone Labor Inc Loudspeaking telephone
SE311031B (enExample) * 1965-12-16 1969-05-27 Ericsson Telefon Ab L M
US3562791A (en) * 1967-12-07 1971-02-09 Int Standard Electric Corp Loudspeaker telephone circuit arrangement
SE339704B (enExample) * 1970-12-22 1971-10-18 Ericsson Telefon Ab L M

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174578A (en) * 1985-05-04 1986-11-05 Stc Plc Loudspeaking telephone

Also Published As

Publication number Publication date
CA993582A (en) 1976-07-20
IT1002335B (it) 1976-05-20
DE2362927A1 (de) 1974-07-04
ES421458A1 (es) 1976-04-01
DE2362927B2 (de) 1976-02-26
FR2210872B1 (enExample) 1977-06-10
SE365375B (enExample) 1974-03-18
FR2210872A1 (enExample) 1974-07-12
US3902023A (en) 1975-08-26
JPS4991104A (enExample) 1974-08-30
NL7316587A (enExample) 1974-06-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee