FR3084223B1 - Etage de sortie suiveur classe a - Google Patents

Etage de sortie suiveur classe a Download PDF

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Publication number
FR3084223B1
FR3084223B1 FR1856568A FR1856568A FR3084223B1 FR 3084223 B1 FR3084223 B1 FR 3084223B1 FR 1856568 A FR1856568 A FR 1856568A FR 1856568 A FR1856568 A FR 1856568A FR 3084223 B1 FR3084223 B1 FR 3084223B1
Authority
FR
France
Prior art keywords
follower
transistors
transistor
class
stage
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.)
Active
Application number
FR1856568A
Other languages
English (en)
Other versions
FR3084223A1 (fr
Inventor
Alexandre Huffenus
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.)
Devialet SA
Original Assignee
Devialet SA
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 Devialet SA filed Critical Devialet SA
Priority to FR1856568A priority Critical patent/FR3084223B1/fr
Publication of FR3084223A1 publication Critical patent/FR3084223A1/fr
Application granted granted Critical
Publication of FR3084223B1 publication Critical patent/FR3084223B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/301—CMOS common drain output SEPP amplifiers
    • H03F3/3016—CMOS common drain output SEPP amplifiers with symmetrical driving of the end stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/3022—CMOS common source output SEPP amplifiers
    • H03F3/3028—CMOS common source output SEPP amplifiers with symmetrical driving of the end stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/3055—Parallelled mixed SEPP stages, e.g. a CMOS common drain and a CMOS common source in parallel or bipolar SEPP and FET SEPP in parallel
    • H03F3/3059—Parallelled mixed SEPP stages, e.g. a CMOS common drain and a CMOS common source in parallel or bipolar SEPP and FET SEPP in parallel with symmetrical driving of the end stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
    • H03F3/505—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/219—Follower transistors are added at the input of the amplifier, e.g. source or emitter followers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/555—A voltage generating circuit being realised for biasing different circuit elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)

Abstract

L'invention concerne un étage (8) de sortie suiveur classe A comportant, entre deux rails d'alimentation (14, 15) : - un étage suiveur (20) à paire de rétroactions complémentaires comportant : - un étage (16) d'amplification en source commune comportant deux transistors de puissance MOS (17, 18) de polarités différentes, - deux transistors suiveurs (22, 24) de polarités différentes reliés par leur source à la sortie (12), chaque transistor suiveur (22, 24) ayant son drain relié à la grille du transistor de puissance (18, 17) connecté à l'autre rail d'alimentation (15, 14) par l'intermédiaire d'un transistor monté en grille commune (26, 28) de polarité différente, le transistor suiveur (22, 24) et le transistor de puissance (18, 17) reliés étant de même polarité ; et - une entrée (10) pour l'étage de sortie suiveur classe A, appliquée aux grilles des transistors suiveurs (22, 24), - un circuit de polarisation à boucle translinéaire (70) comportant deux transistors de polarisation (72, 74) de polarités différentes reliés en parallèle entre les grilles des deux transistors de puissance (17, 18); et - deux générateurs de tensions de référence distincts (92, 94) reliés chacun à la grille d'un des transistors (72, 74) pour fixer le courant de repos des transistors de puissance (17, 18). Application à un ampli audio
FR1856568A 2018-07-17 2018-07-17 Etage de sortie suiveur classe a Active FR3084223B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1856568A FR3084223B1 (fr) 2018-07-17 2018-07-17 Etage de sortie suiveur classe a

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1856568 2018-07-17
FR1856568A FR3084223B1 (fr) 2018-07-17 2018-07-17 Etage de sortie suiveur classe a

Publications (2)

Publication Number Publication Date
FR3084223A1 FR3084223A1 (fr) 2020-01-24
FR3084223B1 true FR3084223B1 (fr) 2020-10-09

Family

ID=65443903

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1856568A Active FR3084223B1 (fr) 2018-07-17 2018-07-17 Etage de sortie suiveur classe a

Country Status (1)

Country Link
FR (1) FR3084223B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2602655B (en) * 2021-01-08 2023-08-02 Nordic Semiconductor Asa Local oscillator buffer
US11683018B2 (en) 2021-09-17 2023-06-20 Analog Devices International Unlimited Company Class A amplifier with push-pull characteristic

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7710200B2 (en) * 2007-08-02 2010-05-04 Korea Advanced Institute Of Science And Technology Output buffer and power amplifier comprising thereof

Also Published As

Publication number Publication date
FR3084223A1 (fr) 2020-01-24

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