AU547891B2 - Closed loop gain control - Google Patents

Closed loop gain control

Info

Publication number
AU547891B2
AU547891B2 AU83469/82A AU8346982A AU547891B2 AU 547891 B2 AU547891 B2 AU 547891B2 AU 83469/82 A AU83469/82 A AU 83469/82A AU 8346982 A AU8346982 A AU 8346982A AU 547891 B2 AU547891 B2 AU 547891B2
Authority
AU
Australia
Prior art keywords
closed loop
gain control
loop gain
closed
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.)
Ceased
Application number
AU83469/82A
Other versions
AU8346982A (en
Inventor
Jacques Yves Balch
Gilbert Marie Marcel Ferrieu
Yves Jean Francois Hetet
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.)
T.R.T.
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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
Priority claimed from FR8109190A external-priority patent/FR2505587A1/en
Priority claimed from FR8119155A external-priority patent/FR2514595A1/en
Application filed by Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Publication of AU8346982A publication Critical patent/AU8346982A/en
Application granted granted Critical
Publication of AU547891B2 publication Critical patent/AU547891B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
AU83469/82A 1981-05-08 1982-05-06 Closed loop gain control Ceased AU547891B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8109190 1981-05-08
FR8109190A FR2505587A1 (en) 1981-05-08 1981-05-08 DEVICE FOR AVOIDING GENERATING MAINTAINED OSCILLATIONS IN A LOOP SYSTEM
FR8119155 1981-10-12
FR8119155A FR2514595A1 (en) 1981-10-12 1981-10-12 HANDS-FREE TELEPHONE STATION WITH SWITCHABLE GAINS ON TWO WAYS OF SPEECH

Publications (2)

Publication Number Publication Date
AU8346982A AU8346982A (en) 1982-11-11
AU547891B2 true AU547891B2 (en) 1985-11-07

Family

ID=26222382

Family Applications (1)

Application Number Title Priority Date Filing Date
AU83469/82A Ceased AU547891B2 (en) 1981-05-08 1982-05-06 Closed loop gain control

Country Status (5)

Country Link
EP (1) EP0065335B1 (en)
JP (1) JPH0662104A (en)
AU (1) AU547891B2 (en)
CA (1) CA1190984A (en)
DE (1) DE3261682D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU604544B2 (en) * 1987-05-15 1990-12-20 Alcatel N.V. A volume control circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514595A1 (en) * 1981-10-12 1983-04-15 Trt Telecom Radio Electr HANDS-FREE TELEPHONE STATION WITH SWITCHABLE GAINS ON TWO WAYS OF SPEECH
FR2505587A1 (en) * 1981-05-08 1982-11-12 Trt Telecom Radio Electr DEVICE FOR AVOIDING GENERATING MAINTAINED OSCILLATIONS IN A LOOP SYSTEM

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156113B (en) * 1958-02-28 1963-10-24 Siemens Ag Circuit arrangement for telephone systems with a voice-controlled feedback lock
GB1349734A (en) * 1969-11-07 1974-04-10 Post Office Arrangements for amplifying and reproducing audio frequency signals
JPS5529676Y2 (en) * 1975-07-03 1980-07-15
NL7612358A (en) * 1976-11-08 1978-05-10 Philips Nv AMPLIFIER FOR ACOUSTIC SIGNALS EQUIPPED WITH MEANS FOR SUPPRESSING UNDESIRABLE INTERFERENCE SIGNALS.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU604544B2 (en) * 1987-05-15 1990-12-20 Alcatel N.V. A volume control circuit

Also Published As

Publication number Publication date
AU8346982A (en) 1982-11-11
EP0065335A1 (en) 1982-11-24
JPH0662104A (en) 1994-03-04
CA1190984A (en) 1985-07-23
DE3261682D1 (en) 1985-02-07
EP0065335B1 (en) 1984-12-27

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