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AU2191088A - A speech circuit for a telephone - Google Patents

A speech circuit for a telephone

Info

Publication number
AU2191088A
AU2191088A AU21910/88A AU2191088A AU2191088A AU 2191088 A AU2191088 A AU 2191088A AU 21910/88 A AU21910/88 A AU 21910/88A AU 2191088 A AU2191088 A AU 2191088A AU 2191088 A AU2191088 A AU 2191088A
Authority
AU
Australia
Prior art keywords
telephone
speech circuit
speech
circuit
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.)
Abandoned
Application number
AU21910/88A
Inventor
Not Given Name
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.)
Lake Electronic Technologies Ltd
Original Assignee
Lake Electronic Technologies Ltd
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 Lake Electronic Technologies Ltd filed Critical Lake Electronic Technologies Ltd
Publication of AU2191088A publication Critical patent/AU2191088A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
AU21910/88A 1987-09-07 1988-09-06 A speech circuit for a telephone Abandoned AU2191088A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IE2384/87 1987-09-07
IE872384A IE872384L (en) 1987-09-07 1987-09-07 Speech circuit for telephone

Publications (1)

Publication Number Publication Date
AU2191088A true AU2191088A (en) 1989-03-09

Family

ID=11034497

Family Applications (1)

Application Number Title Priority Date Filing Date
AU21910/88A Abandoned AU2191088A (en) 1987-09-07 1988-09-06 A speech circuit for a telephone

Country Status (7)

Country Link
CN (1) CN1032092A (en)
AU (1) AU2191088A (en)
GB (1) GB2209646B (en)
IE (1) IE872384L (en)
NL (1) NL8702310A (en)
SE (1) SE8704927L (en)
ZA (1) ZA876822B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU622524B2 (en) * 1989-03-16 1992-04-09 Alcatel Australia Limited Receiver mute circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263850B (en) * 1965-11-10 1968-03-21 Telefunken Patent Electrically adjustable voltage divider with low non-linear distortion
GB1207339A (en) * 1967-12-07 1970-09-30 Standard Telephones Cables Ltd Loud speaking telephone circuits
SE320599B (en) * 1968-03-26 1970-02-09 Bofors Ab
US3533006A (en) * 1968-11-04 1970-10-06 Collins Radio Co Infinite range electronics gain control circuit
JPS5549451B2 (en) * 1972-08-30 1980-12-12
FR2522451B1 (en) * 1982-03-01 1988-10-14 Audibel IMPROVEMENT IN THE AUTOMATIC GAIN CONTROL CIRCUIT OF A TRANSISTOR AMPLIFICATION SYSTEM AND HEARING CORRECTION APPARATUS PROVIDED WITH SUCH A CIRCUIT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU622524B2 (en) * 1989-03-16 1992-04-09 Alcatel Australia Limited Receiver mute circuit

Also Published As

Publication number Publication date
CN1032092A (en) 1989-03-29
ZA876822B (en) 1988-05-25
IE872384L (en) 1989-03-07
GB2209646A (en) 1989-05-17
GB2209646B (en) 1991-06-12
GB8721477D0 (en) 1987-10-21
SE8704927D0 (en) 1987-12-10
SE8704927L (en) 1989-03-08
NL8702310A (en) 1989-04-03

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