FR2449362A1 - AMPLIFIER COMPRISING A SUPPLY CIRCUIT AND AN AMPLIFICATION STAGE CONNECTED TO IT - Google Patents

AMPLIFIER COMPRISING A SUPPLY CIRCUIT AND AN AMPLIFICATION STAGE CONNECTED TO IT

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Withdrawn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
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.)
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/en
Withdrawn legal-status Critical Current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.AMPLIFIER PROVIDED WITH A POWER SUPPLY CIRCUIT 1 WHICH IS COUPLED THROUGH A DYNAMIC DETECTOR 4 TO A SIGNAL INPUT 5 IN ORDER TO PROVIDE A SUPPLY VOLTAGE VARIING CONTINUOUSLY WITH THE DYNAMICS OF THE INPUT SIGNAL. THE SUPPLY CIRCUIT INCLUDES, FOR THIS EFFECT, A BUFFER CAPACITOR WHICH IS CONNECTED, THROUGH A SWITCH, PERIODICALLY TO A NETWORK INPUT 15 AS WELL AS A VOLTAGE COMPARATOR COUPLED TO A SWITCH REGULATION INPUT FOR CLOSE THE SWITCH IN PARTS OF THE MAINS VOLTAGE PERIODS DETERMINED BY THE DYNAMIC SENSOR OUTPUT SIGNAL. APPLICATION: TO AN AUDIO SIGNAL RESTITUTION DEVICE.

FR8002982A 1979-02-13 1980-02-11 AMPLIFIER COMPRISING A SUPPLY CIRCUIT AND AN AMPLIFICATION STAGE CONNECTED TO IT Withdrawn FR2449362A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7901118A NL7901118A (en) 1979-02-13 1979-02-13 AMPLIFIER CONTAINING A POWER SUPPLY CIRCUIT AND A CONNECTED AMPLIFIER STAGE.

Publications (1)

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

Family

ID=19832627

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8002982A Withdrawn FR2449362A1 (en) 1979-02-13 1980-02-11 AMPLIFIER COMPRISING A SUPPLY CIRCUIT AND AN AMPLIFICATION STAGE CONNECTED TO IT

Country Status (9)

Country Link
JP (1) JPS55109006A (en)
AU (1) AU5537080A (en)
DE (1) DE3003833A1 (en)
ES (1) ES488449A0 (en)
FR (1) FR2449362A1 (en)
GB (1) GB2043382A (en)
IT (1) IT1193375B (en)
NL (1) NL7901118A (en)
SE (1) SE8001041L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532806A1 (en) * 1982-09-02 1984-03-09 Philips Nv DEVICE FOR CONVERTING AN ELECTRICAL SIGNAL TO AN ACOUSTIC SIGNAL

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664655A5 (en) * 1980-12-12 1988-03-15 Patelhold Patentverwertung METHOD AND AMPLIFIER CIRCUIT FOR THE AMPLIFICATION OF ELECTRICAL SIGNALS, IN PARTICULAR LF MODULATION SIGNALS OF A BROADCASTING TRANSMITTER.
IT1200794B (en) * 1985-10-16 1989-01-27 Sgs Microelettronica Spa DEVICE TO INCREASE THE OUTPUT POWER OF A LOW VOLTAGE POWERED RADIO EQUIPMENT, PARTICULARLY OF THE RADIO TYPE
KR920017329A (en) * 1991-02-22 1992-09-26 원본미기재 Adaptive voltage regulator
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 (en) * 1969-12-16 1971-10-08 Western Electric Co
FR2109336A5 (en) * 1970-10-13 1972-05-26 Thomson Csf
DE2137249A1 (en) * 1971-07-26 1973-02-08 Deutsche Automobilgesellsch PROCESS FOR REDUCING POWER LOSS IN POWER AMPLIFIERS
US3753138A (en) * 1971-06-03 1973-08-14 Ampex Amplifier system with continuously variable supply
FR2308175A1 (en) * 1975-04-17 1976-11-12 Sony Corp AMPLIFIER ESPECIALLY OF THE PUSH-PULL TYPE AT ONE END
FR2349997A1 (en) * 1976-04-28 1977-11-25 Matsushita Electric Ind Co Ltd POWER AMPLIFIER
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 (en) * 1969-12-16 1971-10-08 Western Electric Co
FR2109336A5 (en) * 1970-10-13 1972-05-26 Thomson Csf
US3753138A (en) * 1971-06-03 1973-08-14 Ampex Amplifier system with continuously variable supply
DE2137249A1 (en) * 1971-07-26 1973-02-08 Deutsche Automobilgesellsch PROCESS FOR REDUCING POWER LOSS IN POWER AMPLIFIERS
FR2308175A1 (en) * 1975-04-17 1976-11-12 Sony Corp AMPLIFIER ESPECIALLY OF THE PUSH-PULL TYPE AT ONE END
US4087759A (en) * 1976-03-02 1978-05-02 Nippon Gakki Seizo Kabushiki Kaisha Power amplifier devices
FR2349997A1 (en) * 1976-04-28 1977-11-25 Matsushita Electric Ind Co Ltd POWER AMPLIFIER

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 (en) * 1982-09-02 1984-03-09 Philips Nv DEVICE FOR CONVERTING AN ELECTRICAL SIGNAL TO AN ACOUSTIC SIGNAL

Also Published As

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

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Legal Events

Date Code Title Description
ST Notification of lapse