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FR2449362A1 - Amplificateur comportant un circuit d'alimentation et un etage d'amplification qui y est connecte - Google Patents

Amplificateur comportant un circuit d'alimentation et un etage d'amplification qui y est connecte

Info

Publication number
FR2449362A1
FR2449362A1 FR8002982A FR8002982A FR2449362A1 FR 2449362 A1 FR2449362 A1 FR 2449362A1 FR 8002982 A FR8002982 A FR 8002982A FR 8002982 A FR8002982 A FR 8002982A FR 2449362 A1 FR2449362 A1 FR 2449362A1
Authority
FR
France
Prior art keywords
supply circuit
input
switch
signal
amplifier
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.)
Withdrawn
Application number
FR8002982A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2449362A1 publication Critical patent/FR2449362A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/15—Indexing scheme relating to amplifiers the supply or bias voltage or current at the drain side of a FET being continuously controlled by a controlling signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/228—A measuring circuit being coupled to the input of an amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

AMPLIFICATEUR POURVU D'UN CIRCUIT D'ALIMENTATION 1 QUI EST COUPLE PAR L'INTERMEDIAIRE D'UN DETECTEUR DE DYNAMIQUE 4 A UNE ENTREE DE SIGNAUX 5 AFIN DE FOURNIR UNE TENSION D'ALIMENTATION VARIANT EN CONTINU AVEC LA DYNAMIQUE DU SIGNAL D'ENTREE. LE CIRCUIT D'ALIMENTATION COMPORTE, A CET EFFET, UN CONDENSATEUR TAMPON QUI EST CONNECTE, PAR L'INTERMEDIAIRE D'UN COMMUTATEUR, PERIODIQUEMENT A UNE ENTREE DE RESEAU 15 AINSI QU'UN COMPARATEUR DE TENSIONS COUPLE A UNE ENTREE DE REGULATION DU COMMUTATEUR POUR FERMER LE COMMUTATEUR DANS DES PARTIES DES PERIODES DE LA TENSION DU RESEAU DETERMINEES PAR LE SIGNAL DE SORTIE DU DETECTEUR DE DYNAMIQUE. APPLICATION: A UN APPAREIL DE RESTITUTION D'UN SIGNAL AUDIO.
FR8002982A 1979-02-13 1980-02-11 Amplificateur comportant un circuit d'alimentation et un etage d'amplification qui y est connecte Withdrawn FR2449362A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7901118A NL7901118A (nl) 1979-02-13 1979-02-13 Versterker bevattende een voedingsschakeling en een daarmee verbonden versterker-trap.

Publications (1)

Publication Number Publication Date
FR2449362A1 true FR2449362A1 (fr) 1980-09-12

Family

ID=19832627

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8002982A Withdrawn FR2449362A1 (fr) 1979-02-13 1980-02-11 Amplificateur comportant un circuit d'alimentation et un etage d'amplification qui y est connecte

Country Status (9)

Country Link
JP (1) JPS55109006A (fr)
AU (1) AU5537080A (fr)
DE (1) DE3003833A1 (fr)
ES (1) ES8102434A1 (fr)
FR (1) FR2449362A1 (fr)
GB (1) GB2043382A (fr)
IT (1) IT1193375B (fr)
NL (1) NL7901118A (fr)
SE (1) SE8001041L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532806A1 (fr) * 1982-09-02 1984-03-09 Philips Nv Dispositif servant a convertir un signal electrique en un signal acoustique

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664655A5 (de) * 1980-12-12 1988-03-15 Patelhold Patentverwertung Verfahren und verstaerkerschaltung zum verstaerken elektrischer signale, insbesondere nf-modulationssignale eines rundfunksenders.
IT1200794B (it) * 1985-10-16 1989-01-27 Sgs Microelettronica Spa Dispositivo per aumentare la potenza di uscita di una apparecchio radio alimentato a bassa tensione particolarmente del tipo autoradio
KR920017329A (ko) * 1991-02-22 1992-09-26 원본미기재 적응전압 조정기
GB2275384A (en) * 1993-02-22 1994-08-24 Thomson Consumer Electronics Controlling amplifier power supply in dependence on signal level
GB2360410A (en) * 2000-03-18 2001-09-19 Univ Bristol An amplifier in which the input signal is delayed to allow time for the power supply to adjust to a level which minimises power loss
US8362838B2 (en) * 2007-01-19 2013-01-29 Cirrus Logic, Inc. Multi-stage amplifier with multiple sets of fixed and variable voltage rails
US9154095B2 (en) 2013-03-15 2015-10-06 Bose Corporation Boost-on-demand amplifier
US9184705B2 (en) 2013-03-15 2015-11-10 Bose Corporation Feedback mechanism for boost-on-demand amplifiers

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728327A (en) * 1952-03-27 1955-04-20 Murray Grimshaw Crosby Improvements in or relating to modulated wave amplifiers
US3426266A (en) * 1966-03-22 1969-02-04 Collins Radio Co Signal modulated self-regulated switching voltage regulatoramplifier
US3486128A (en) * 1968-02-07 1969-12-23 Us Army Power amplifier for amplitude modulated transmitter
FR2075020A5 (fr) * 1969-12-16 1971-10-08 Western Electric Co
FR2109336A5 (fr) * 1970-10-13 1972-05-26 Thomson Csf
DE2137249A1 (de) * 1971-07-26 1973-02-08 Deutsche Automobilgesellsch Verfahren zur verringerung der verlustleistung bei leistungsverstaerkern
US3753138A (en) * 1971-06-03 1973-08-14 Ampex Amplifier system with continuously variable supply
FR2308175A1 (fr) * 1975-04-17 1976-11-12 Sony Corp Amplificateur notamment du type push-pull a une extremite
FR2349997A1 (fr) * 1976-04-28 1977-11-25 Matsushita Electric Ind Co Ltd Amplificateur de puissance
US4087759A (en) * 1976-03-02 1978-05-02 Nippon Gakki Seizo Kabushiki Kaisha Power amplifier devices

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728327A (en) * 1952-03-27 1955-04-20 Murray Grimshaw Crosby Improvements in or relating to modulated wave amplifiers
US3426266A (en) * 1966-03-22 1969-02-04 Collins Radio Co Signal modulated self-regulated switching voltage regulatoramplifier
US3486128A (en) * 1968-02-07 1969-12-23 Us Army Power amplifier for amplitude modulated transmitter
FR2075020A5 (fr) * 1969-12-16 1971-10-08 Western Electric Co
FR2109336A5 (fr) * 1970-10-13 1972-05-26 Thomson Csf
US3753138A (en) * 1971-06-03 1973-08-14 Ampex Amplifier system with continuously variable supply
DE2137249A1 (de) * 1971-07-26 1973-02-08 Deutsche Automobilgesellsch Verfahren zur verringerung der verlustleistung bei leistungsverstaerkern
FR2308175A1 (fr) * 1975-04-17 1976-11-12 Sony Corp Amplificateur notamment du type push-pull a une extremite
US4087759A (en) * 1976-03-02 1978-05-02 Nippon Gakki Seizo Kabushiki Kaisha Power amplifier devices
FR2349997A1 (fr) * 1976-04-28 1977-11-25 Matsushita Electric Ind Co Ltd Amplificateur de puissance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/68 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532806A1 (fr) * 1982-09-02 1984-03-09 Philips Nv Dispositif servant a convertir un signal electrique en un signal acoustique

Also Published As

Publication number Publication date
GB2043382A (en) 1980-10-01
IT1193375B (it) 1988-06-15
DE3003833A1 (de) 1980-08-14
NL7901118A (nl) 1980-08-15
AU5537080A (en) 1980-08-21
SE8001041L (sv) 1980-08-14
ES488449A0 (es) 1980-12-16
JPS55109006A (en) 1980-08-21
ES8102434A1 (es) 1980-12-16
IT8019824A0 (it) 1980-02-08

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Legal Events

Date Code Title Description
ST Notification of lapse