FR2908568B1 - ELECTRONIC CONTROL DEVICE FOR ACOUSTIC LEVEL WITHOUT EXTERNAL POWER SUPPLY. - Google Patents

ELECTRONIC CONTROL DEVICE FOR ACOUSTIC LEVEL WITHOUT EXTERNAL POWER SUPPLY.

Info

Publication number
FR2908568B1
FR2908568B1 FR0609773A FR0609773A FR2908568B1 FR 2908568 B1 FR2908568 B1 FR 2908568B1 FR 0609773 A FR0609773 A FR 0609773A FR 0609773 A FR0609773 A FR 0609773A FR 2908568 B1 FR2908568 B1 FR 2908568B1
Authority
FR
France
Prior art keywords
power supply
control device
electronic control
external power
acoustic level
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 - Fee Related
Application number
FR0609773A
Other languages
French (fr)
Other versions
FR2908568A1 (en
Inventor
Barbie De Preaudeau Marie Caroline O'neill
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39325555&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FR2908568(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to FR0609773A priority Critical patent/FR2908568B1/en
Publication of FR2908568A1 publication Critical patent/FR2908568A1/en
Application granted granted Critical
Publication of FR2908568B1 publication Critical patent/FR2908568B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/007—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using FET type devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/004—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using continuously variable impedance devices
    • 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
    • H04R3/007—Protection circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Networks Using Active Elements (AREA)
FR0609773A 2006-11-09 2006-11-09 ELECTRONIC CONTROL DEVICE FOR ACOUSTIC LEVEL WITHOUT EXTERNAL POWER SUPPLY. Expired - Fee Related FR2908568B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0609773A FR2908568B1 (en) 2006-11-09 2006-11-09 ELECTRONIC CONTROL DEVICE FOR ACOUSTIC LEVEL WITHOUT EXTERNAL POWER SUPPLY.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0609773A FR2908568B1 (en) 2006-11-09 2006-11-09 ELECTRONIC CONTROL DEVICE FOR ACOUSTIC LEVEL WITHOUT EXTERNAL POWER SUPPLY.

Publications (2)

Publication Number Publication Date
FR2908568A1 FR2908568A1 (en) 2008-05-16
FR2908568B1 true FR2908568B1 (en) 2013-03-08

Family

ID=39325555

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0609773A Expired - Fee Related FR2908568B1 (en) 2006-11-09 2006-11-09 ELECTRONIC CONTROL DEVICE FOR ACOUSTIC LEVEL WITHOUT EXTERNAL POWER SUPPLY.

Country Status (1)

Country Link
FR (1) FR2908568B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH714905A2 (en) * 2018-04-16 2019-10-31 Ammann Consulting & Trading Gmbh Volume control device for an audio system.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368158A (en) * 1965-05-14 1968-02-06 Bell Telephone Labor Inc Low-level automatic gain control circuitry
EP0095902A1 (en) * 1982-05-28 1983-12-07 British Broadcasting Corporation Headphone level protection circuit
DK1488662T3 (en) * 2002-03-20 2015-04-13 Sennheiser Comm As Active audio compression in telecommunications

Also Published As

Publication number Publication date
FR2908568A1 (en) 2008-05-16

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20160729