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
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)
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)
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)
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 |
-
2006
- 2006-11-09 FR FR0609773A patent/FR2908568B1/en not_active Expired - Fee Related
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 |