FR2259480A1 - - Google Patents

Info

Publication number
FR2259480A1
FR2259480A1 FR7501994A FR7501994A FR2259480A1 FR 2259480 A1 FR2259480 A1 FR 2259480A1 FR 7501994 A FR7501994 A FR 7501994A FR 7501994 A FR7501994 A FR 7501994A FR 2259480 A1 FR2259480 A1 FR 2259480A1
Authority
FR
France
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.)
Withdrawn
Application number
FR7501994A
Other languages
French (fr)
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 DE2403799A external-priority patent/DE2403799B2/de
Priority claimed from DE2406258A external-priority patent/DE2406258C2/de
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2259480A1 publication Critical patent/FR2259480A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
FR7501994A 1974-01-26 1975-01-22 Withdrawn FR2259480A1 (forum.php)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2403799A DE2403799B2 (de) 1974-01-26 1974-01-26 Verstärkerschaltung mit selbsttätiger Verstärkungsregelung
DE2406258A DE2406258C2 (de) 1974-02-09 1974-02-09 Schaltung zur automatischen Dynamik-Kompression oder -Expansion

Publications (1)

Publication Number Publication Date
FR2259480A1 true FR2259480A1 (forum.php) 1975-08-22

Family

ID=25766519

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7501994A Withdrawn FR2259480A1 (forum.php) 1974-01-26 1975-01-22

Country Status (13)

Country Link
US (1) US3969680A (forum.php)
JP (1) JPS5915418B2 (forum.php)
AT (1) AT356714B (forum.php)
BR (1) BR7500507A (forum.php)
DK (1) DK144259C (forum.php)
ES (1) ES434155A1 (forum.php)
FR (1) FR2259480A1 (forum.php)
GB (1) GB1500192A (forum.php)
HK (1) HK1180A (forum.php)
IT (1) IT1030980B (forum.php)
MY (1) MY8100005A (forum.php)
NO (1) NO142768C (forum.php)
SE (1) SE396867B (forum.php)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316691A1 (fr) * 1975-07-03 1977-01-28 Sony Corp Circuit de compression et de dilatation de signaux
FR2370392A1 (fr) * 1976-11-08 1978-06-02 Dbx Dispositif de compression-expansion d'un signal audiofrequence
FR2402353A1 (fr) * 1977-09-02 1979-03-30 Sanyo Electric Co Appareil pour la reduction du bruit du type a separation en plages de frequence
FR2431219A1 (fr) * 1978-07-13 1980-02-08 Licentia Gmbh Montage pour la production de tension continue de commande en fonction d'une tension alternative
FR2438377A1 (fr) * 1978-10-02 1980-04-30 Licentia Gmbh Montage pour engendrer une grandeur pilote pour commander le facteur de transmission de circuits d'amplification ou d'amortissement a commande electronique
FR2442556A1 (fr) * 1978-11-23 1980-06-20 Licentia Gmbh Systeme de circuits pour la production d'une tension continue de commande en fonction d'une tension alternative

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5289007A (en) * 1976-01-20 1977-07-26 Victor Co Of Japan Ltd System for noise reducing
DE2619192A1 (de) * 1976-04-30 1977-11-17 Licentia Gmbh Schaltung zur automatischen dynamik-kompression oder -expansion
JPS52142409A (en) * 1976-05-21 1977-11-28 Toshiba Corp Noise reduction system
DE2747415C3 (de) * 1976-10-21 1981-05-14 Tokyo Shibaura Electric Co., Ltd., Kawasaki, Kanagawa Rauschunterdrückungssystem
US4124773A (en) * 1976-11-26 1978-11-07 Robin Elkins Audio storage and distribution system
US4123711A (en) * 1977-01-24 1978-10-31 Canadian Patents And Development Limited Synchronized compressor and expander voice processing system for radio telephone
US4184047A (en) * 1977-06-22 1980-01-15 Langford Robert H Audio signal processing system
US4181896A (en) * 1977-08-06 1980-01-01 Licentia Patent-Verwaltungs-G.M.B.H Device for optional dynamic compression or expansion
GB2030826A (en) * 1977-09-27 1980-04-10 Licentia Gmbh Compression or expansion systems
DE2812431A1 (de) * 1978-03-22 1979-09-27 Licentia Gmbh Verstaerker mit veraenderbarem uebertragungsmass
DE2830786C3 (de) * 1978-07-13 1981-06-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zur Erzeugung einer von einer Wechselspannung abhängigen Steuergleichspannung
JPS5545112A (en) 1978-09-22 1980-03-29 Sony Corp Signal transmitter
DE2912346C2 (de) * 1979-03-29 1982-08-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kompander zur Umschaltung auf unterschiedliche Kompanderkennlinien
DE2950584C2 (de) * 1979-12-15 1984-07-12 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung mit steuerbarem Widerstand
JPS56106433A (en) * 1980-01-28 1981-08-24 Sony Corp Noise reducing circuit
JPS5744338A (en) 1980-08-29 1982-03-12 Victor Co Of Japan Ltd Noise reduction device
US4388654A (en) * 1981-03-17 1983-06-14 Rca Corporation Video disc player with selectively enabled audio signal expander circuitry
DE3124289A1 (de) * 1981-06-19 1983-01-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zur erzeugung einer von einer wechselspannung abhaengigen steuergleichspannung
US4536888A (en) * 1981-08-21 1985-08-20 Plantronics, Inc. Voice communication instrument system with line-powered receiver conditioning circuit
EP0084323B1 (de) * 1982-01-15 1986-07-30 TELEFUNKEN Fernseh und Rundfunk GmbH Schaltungsanordnung zur Erzeugung einer von einer Wechselspannung abhängigen Steuerspannung
US4879746A (en) * 1987-12-30 1989-11-07 Plantronics, Inc. Voice communication link interface apparatus
US5083080A (en) * 1989-06-30 1992-01-21 Anritsu Corporation High frequency signal measuring equipment with cabled detecting and signal companding
US5357278A (en) * 1993-01-14 1994-10-18 Sony Electronics, Inc. Integrated linear/non-linear static and controllable dynamic companding
US5892823A (en) * 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
US6304145B1 (en) * 2000-02-02 2001-10-16 Nokia Networks Oy Large signal amplifier gain compensation circuit
JP2002185275A (ja) * 2000-10-06 2002-06-28 Toshiba Corp 可変利得増幅器
US6928170B1 (en) 2000-11-02 2005-08-09 Audio Technica, Inc. Wireless microphone having a split-band audio frequency companding system that provides improved noise reduction and sound quality
US20040120534A1 (en) * 2002-12-19 2004-06-24 Mills William H. Headphone automatic gain control system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1300968B (de) * 1966-03-08 1969-08-14 Nippon Electric Co Deltamodulations-Nachrichtenuebertragungssystem mit Compandereigenschaften
FR2109336A5 (forum.php) * 1970-10-13 1972-05-26 Thomson Csf
GB1367002A (en) * 1971-04-06 1974-09-18 Victor Company Of Japan Compression and/or expansion system and circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316691A1 (fr) * 1975-07-03 1977-01-28 Sony Corp Circuit de compression et de dilatation de signaux
FR2370392A1 (fr) * 1976-11-08 1978-06-02 Dbx Dispositif de compression-expansion d'un signal audiofrequence
FR2402353A1 (fr) * 1977-09-02 1979-03-30 Sanyo Electric Co Appareil pour la reduction du bruit du type a separation en plages de frequence
FR2431219A1 (fr) * 1978-07-13 1980-02-08 Licentia Gmbh Montage pour la production de tension continue de commande en fonction d'une tension alternative
FR2438377A1 (fr) * 1978-10-02 1980-04-30 Licentia Gmbh Montage pour engendrer une grandeur pilote pour commander le facteur de transmission de circuits d'amplification ou d'amortissement a commande electronique
FR2442556A1 (fr) * 1978-11-23 1980-06-20 Licentia Gmbh Systeme de circuits pour la production d'une tension continue de commande en fonction d'une tension alternative

Also Published As

Publication number Publication date
DK144259B (da) 1982-01-25
AT356714B (de) 1980-05-27
GB1500192A (en) 1978-02-08
SE7500779L (forum.php) 1975-07-28
DK6275A (forum.php) 1975-09-22
US3969680A (en) 1976-07-13
IT1030980B (it) 1979-04-10
JPS5915418B2 (ja) 1984-04-09
ATA27675A (de) 1979-10-15
NO750028L (forum.php) 1975-08-25
MY8100005A (en) 1981-12-31
SE396867B (sv) 1977-10-03
HK1180A (en) 1980-01-18
DK144259C (da) 1982-06-28
NO142768C (no) 1980-10-08
AU7762775A (en) 1976-07-29
ES434155A1 (es) 1976-12-16
BR7500507A (pt) 1975-11-11
JPS50105306A (forum.php) 1975-08-20
NO142768B (no) 1980-06-30

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Legal Events

Date Code Title Description
RE Withdrawal of published application