WO2000072627A3 - Commande de transducteur - Google Patents

Commande de transducteur Download PDF

Info

Publication number
WO2000072627A3
WO2000072627A3 PCT/GB2000/001798 GB0001798W WO0072627A3 WO 2000072627 A3 WO2000072627 A3 WO 2000072627A3 GB 0001798 W GB0001798 W GB 0001798W WO 0072627 A3 WO0072627 A3 WO 0072627A3
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
transducer driver
inductor
switching
feeds
Prior art date
Application number
PCT/GB2000/001798
Other languages
English (en)
Other versions
WO2000072627A2 (fr
Inventor
Henry Azima
David Gamble
Original Assignee
New Transducers Ltd
Henry Azima
David Gamble
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 New Transducers Ltd, Henry Azima, David Gamble filed Critical New Transducers Ltd
Priority to BR0010246-6A priority Critical patent/BR0010246A/pt
Priority to AU49328/00A priority patent/AU4932800A/en
Priority to EP00931367A priority patent/EP1179286A2/fr
Priority to JP2000619964A priority patent/JP2003500992A/ja
Publication of WO2000072627A2 publication Critical patent/WO2000072627A2/fr
Publication of WO2000072627A3 publication Critical patent/WO2000072627A3/fr

Links

Classifications

    • 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
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • 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
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Electronic Switches (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un appareil et un procédé de commande d'un transducteur capacitif. Une source d'énergie de commutation (classe D) comprend un étage (21) de sortie de commutation alimentant le transducteur (27) par une bobine d'induction (25). Au lieu d'utiliser une contre-réaction de tension, un capteur (23) mesure le courant par la bobine d'induction et le renvoie comme contre-réaction.
PCT/GB2000/001798 1999-05-19 2000-05-16 Commande de transducteur WO2000072627A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR0010246-6A BR0010246A (pt) 1999-05-19 2000-05-16 Aparelho ativador de transdutor
AU49328/00A AU4932800A (en) 1999-05-19 2000-05-16 Transducer driver
EP00931367A EP1179286A2 (fr) 1999-05-19 2000-05-16 Commande de transducteur
JP2000619964A JP2003500992A (ja) 1999-05-19 2000-05-16 変換器駆動装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9911505.7A GB9911505D0 (en) 1999-05-19 1999-05-19 Transducer driver
GB9911505.7 1999-05-19

Publications (2)

Publication Number Publication Date
WO2000072627A2 WO2000072627A2 (fr) 2000-11-30
WO2000072627A3 true WO2000072627A3 (fr) 2001-03-08

Family

ID=10853652

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001798 WO2000072627A2 (fr) 1999-05-19 2000-05-16 Commande de transducteur

Country Status (8)

Country Link
EP (1) EP1179286A2 (fr)
JP (1) JP2003500992A (fr)
CN (1) CN1350767A (fr)
AU (1) AU4932800A (fr)
BR (1) BR0010246A (fr)
GB (1) GB9911505D0 (fr)
TW (1) TW502549B (fr)
WO (1) WO2000072627A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0108076D0 (en) * 2001-03-30 2001-05-23 1 Ltd Capacitive power driver circuit
JP3928728B2 (ja) * 2003-09-19 2007-06-13 ソニー株式会社 デジタルアンプ
US7221227B2 (en) * 2005-06-06 2007-05-22 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver
JP4793174B2 (ja) * 2005-11-25 2011-10-12 セイコーエプソン株式会社 静電型トランスデューサ、回路定数の設定方法
JP6186135B2 (ja) * 2013-02-26 2017-08-23 京セラ株式会社 Ｄ級アンプおよび電子機器
CN115516875A (zh) * 2020-06-15 2022-12-23 德州仪器公司 用以驱动电容性负载的具有过电流预测的控制电路

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092610A (en) * 1977-02-17 1978-05-30 Raytheon Company Modulated carrier amplifying system
US4439738A (en) * 1981-11-12 1984-03-27 Honeywell Inc. Class D pulse width modulated amplifier
US4628275A (en) * 1985-07-29 1986-12-09 Rockwell International Corporation Efficient power amplifier for high capacitive devices
US5631605A (en) * 1994-10-19 1997-05-20 U.S. Philips Corporation Power amplifier stage supplying a rectangular signal of controlled amplitude
GB2314474A (en) * 1996-06-21 1997-12-24 Univ Bristol Power saving arrangement for a radio receiver using a class D amplifier and a signal processing section powered from the amplifier
WO1998045939A2 (fr) * 1997-04-07 1998-10-15 Koninklijke Philips Electronics N.V. Amplificateur d'attaque ponte et dispositif de telecommunications

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092610A (en) * 1977-02-17 1978-05-30 Raytheon Company Modulated carrier amplifying system
US4439738A (en) * 1981-11-12 1984-03-27 Honeywell Inc. Class D pulse width modulated amplifier
US4628275A (en) * 1985-07-29 1986-12-09 Rockwell International Corporation Efficient power amplifier for high capacitive devices
US5631605A (en) * 1994-10-19 1997-05-20 U.S. Philips Corporation Power amplifier stage supplying a rectangular signal of controlled amplitude
GB2314474A (en) * 1996-06-21 1997-12-24 Univ Bristol Power saving arrangement for a radio receiver using a class D amplifier and a signal processing section powered from the amplifier
WO1998045939A2 (fr) * 1997-04-07 1998-10-15 Koninklijke Philips Electronics N.V. Amplificateur d'attaque ponte et dispositif de telecommunications

Also Published As

Publication number Publication date
AU4932800A (en) 2000-12-12
GB9911505D0 (en) 1999-07-14
EP1179286A2 (fr) 2002-02-13
CN1350767A (zh) 2002-05-22
TW502549B (en) 2002-09-11
BR0010246A (pt) 2002-02-19
JP2003500992A (ja) 2003-01-07
WO2000072627A2 (fr) 2000-11-30

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